Endangered Species Search by Group

Find out what mammals, insects, fish, plants, etc. are endangered here. Use the selection box below to view full lists by group.

Select a species group:

Please Select Mammals Birds Reptiles Plants Fishes Insects Amphibians Snails Clams Arachnids Crustaceans Worms Corals, Jellyfish, and Sea Anemones Centipedes
Search

The following is a list of Crustaceans of concern. This list combines species from several endangered species lists. Using the total at the bottom of this page as an official count of endangered crustaceans of the world is not recommended. For more information on what species are listed on this site, please visit our About Us page.

	Species Name	Scientific Name
1.	Acanthocyclops hypogeus	Acanthocyclops hypogeus
2.	Adeleana forcarti	Adeleana forcarti
3.	Aglaodiaptomus kingsburyae	Aglaodiaptomus kingsburyae
4.	Aglaodiaptomus marshianus	Aglaodiaptomus marshianus
5.	Alabama Cave Shrimp	Palaemonias alabamae
6.	Alabama Well Amphipod	Stygobromus smithii
7.	Allacanthos pittieri	Allacanthos pittieri
8.	Allodiaptomus satanas	Allodiaptomus satanas
9.	Alona hercegovinae	Alona hercegovinae
10.	Alona sketi	Alona sketi
11.	Alona smirnovi	Alona smirnovi
12.	Angular Dwarf Crayfish	Cambarellus lesliei
13.	Antrisocopia prehensilis	Antrisocopia prehensilis
14.	Apalachicola Cave Crayfish	Cambarus cryptodytes
15.	Aquadulcaris pheronyx	Aquadulcaris pheronyx
16.	Arachnothelphusa melanippe	Arachnothelphusa melanippe
17.	Arctodiaptomus burduricus	Arctodiaptomus burduricus
18.	Arctodiaptomus euacanthus	Arctodiaptomus euacanthus
19.	Arctodiaptomus kamtschaticus	Arctodiaptomus kamtschaticus
20.	Arctodiaptomus michaeli	Arctodiaptomus michaeli
21.	Arizona Cave Amphipod	Stygobromus arizonensis
22.	Arubolana imula	Arubolana imula
Featured Articles: Ten creatures that may become extinct in the next 10 years Orphaned cougar cubs progressing well at Toledo Zoo 10 Unusually White Creatures You'll Probably Never See in Real Life Eight Inexpensive Ways You Can Help Endangered Species More articles
23.	Astacoides crosnieri	Astacoides crosnieri
24.	Astacoides petiti	Astacoides petiti
25.	Atlantasellus cavernicolus	Atlantasellus cavernicolus
26.	Atyid Shrimp	Typhlatya iliffei
27.	Austrothelphusa tigrina	Austrothelphusa tigrina
28.	Austrothelphusa valentula	Austrothelphusa valentula
29.	Austrothelphusa wasselli	Austrothelphusa wasselli
30.	Avotrichodactylus oaxensis	Avotrichodactylus oaxensis
31.	Balcones Cave Amphipod	Stygobromus balconis
32.	Balcones Cave Shrimp	Palaemonetes antrorum
33.	Barr's Cave Amphipod	Stygobromus barri
34.	Bastrop Crayfish	Procambarus texanus
35.	Bat Cave Isopod	Caecidotea macropoda
36.	Bath County Cave Amphipod	Stygobromus mundus
37.	Bearded Red Crayfish	Procambarus pogum
38.	Beautiful Crayfish	Cambarus speciosus
39.	Benton County Cave Crayfish	Cambarus aculabrum
40.	Bermuda Cave Amphipod	Pseudoniphargus grandimanus
41.	Bifurcated Cave Amphipod	Stygobromus bifurcatus
42.	Big Blue Spring Cave Crayfish	Procambarus horsti
43.	Big Sandy Crayfish	Cambarus veteranus
44.	Big South Fork Crayfish	Cambarus bouchardi
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Rare white giraffes sighted for the first time in Kenya The Seven Sea Turtle Species of the World More articles
45.	Big-cheeked Cave Crayfish	Procambarus delicatus
46.	Black Creek Crayfish	Procambarus pictus
47.	Blackbarred Crayfish	Cambarus unestami
48.	Blackbelted Crayfish	Procambarus nigrocinctus
49.	Bluegrass Crayfish	Cambarus batchi
50.	Boeckella bispinosa	Boeckella bispinosa
51.	Boeckella calcaris	Boeckella calcaris
52.	Boeckella geniculata	Boeckella geniculata
53.	Boeckella nyoraensis	Boeckella nyoraensis
54.	Boeckella shieli	Boeckella shieli
55.	Bogidiella bermudensis	Bogidiella bermudensis
56.	Boreas uglowi	Boreas uglowi
57.	Bottiella cucutensis	Bottiella cucutensis
58.	Bottiella medemi	Bottiella medemi
59.	Bousfield's Amphipod	Gammarus bousfieldi
60.	Bowman's Cave Amphipod	Stygobromus bowmani
61.	Branchinecta belki	Branchinecta belki
62.	Branchinecta mexicana	Branchinecta mexicana
63.	Branchinella lithaca	Branchinella lithaca
64.	Branchinella alachua	Branchinella alachua
65.	Branchinella apophysata	Branchinella apophysata
66.	Branchinella basispina	Branchinella basispina
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo 10 Unusually White Creatures You'll Probably Never See in Real Life Rare white giraffes sighted for the first time in Kenya The Seven Sea Turtle Species of the World More articles
67.	Branchinella denticulata	Branchinella denticulata
68.	Branchinella simplex	Branchinella simplex
69.	Branchinella wellardi	Branchinella wellardi
70.	Brawleys Fork Crayfish	Cambarus williami
71.	Brazoria Crayfish	Procambarus brazoriensis
72.	Brine Shrimp	Parartemia contracta
73.	Broad River Spiny Crayfish	Cambarus spicatus
74.	Broad-fingered Crayfish	Astacus astacus
75.	Burnsville Cove Cave Amphipod	Stygobromus conradi
76.	Burrowing Bog Crayfish	Fallicambarus burrisi
77.	Burrowing Crayfish	Engaeus australis
78.	Burrowing Crayfish	Engaeus curvisuturus
79.	Burrowing Crayfish	Engaeus disjuncticus
80.	Burrowing Crayfish	Engaeus granulatus
81.	Burrowing Crayfish	Engaeus mallacoota
82.	Burrowing Crayfish	Engaeus martigener
83.	Burrowing Crayfish	Engaeus nulloporius
84.	Burrowing Crayfish	Engaeus orramakunna
85.	Burrowing Crayfish	Engaeus rostrogaleatus
86.	Burrowing Crayfish	Engaeus spinicaudatus
87.	Burrowing Crayfish	Engaeus sternalis
88.	Burrowing Crayfish	Engaeus urostrictus
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Twelve Incredibly Odd Endangered Creatures Captive cheetah gives birth to largest litter ever recorded More articles
89.	Burrowing Crayfish	Engaeus phyllocercus
90.	Calamoecia australica	Calamoecia australica
91.	Calamoecia elongata	Calamoecia elongata
92.	Calamoecia zeidleri	Calamoecia zeidleri
93.	Calconiscellus gotscheensis	Calconiscellus gotscheensis
94.	California Bay Pea Crab	Parapinnixa affinis
95.	California Freshwater Shrimp	Syncaris pacifica
96.	Cambarus strigosus	Cambarus strigosus
97.	Camp Shelby Burrowing Crayfish	Fallicambarus gordoni
98.	Canthocamptus dedeckkeri	Canthocamptus dedeckkeri
99.	Canthocamptus echinopyge	Canthocamptus echinopyge
100.	Canthocamptus longipes	Canthocamptus longipes
101.	Canthocamptus mammillifurca	Canthocamptus mammillifurca
102.	Canthocamptus sublaevis	Canthocamptus sublaevis
103.	Canthocamptus tasmaniae	Canthocamptus tasmaniae
104.	Carinurella paradoxa	Carinurella paradoxa
105.	Cascade Cave Amphipod	Stygobromus dejectus
106.	Central Missouri Cave Amphipod	Allocrangonyx hubrichti
107.	Ceuthonectes rouchi	Ceuthonectes rouchi
108.	Ceylonthelphusa alpina	Ceylonthelphusa alpina
109.	Ceylonthelphusa armata	Ceylonthelphusa armata
110.	Ceylonthelphusa callista	Ceylonthelphusa callista
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo Eight Inexpensive Ways You Can Help Endangered Species The Seven Sea Turtle Species of the World Rare Black Panther Seen Alive in Kenya More articles
111.	Ceylonthelphusa cavatrix	Ceylonthelphusa cavatrix
112.	Ceylonthelphusa diva	Ceylonthelphusa diva
113.	Ceylonthelphusa durrelli	Ceylonthelphusa durrelli
114.	Ceylonthelphusa kotagama	Ceylonthelphusa kotagama
115.	Ceylonthelphusa nana	Ceylonthelphusa nana
116.	Ceylonthelphusa nata	Ceylonthelphusa nata
117.	Ceylonthelphusa orthos	Ceylonthelphusa orthos
118.	Ceylonthelphusa sanguinea	Ceylonthelphusa sanguinea
119.	Ceylonthelphusa savitriae	Ceylonthelphusa savitriae
120.	Ceylonthelphusa kandambyi	Ceylonthelphusa kandambyi
121.	Ceylonthelphusa venusta	Ceylonthelphusa venusta
122.	Chaceus ibiricensis	Chaceus ibiricensis
123.	Chatooga Crayfish	Cambarus scotti
124.	Chattahoochee Crayfish	Cambarus howardi
125.	Chickamanga Crayfish	Cambarus extraneus
126.	Chirocephalus croaticus	Chirocephalus croaticus
127.	Chirocephalus pelagonicus	Chirocephalus pelagonicus
128.	Chirocephalus reiseri	Chirocephalus reiseri
129.	Choctaw Riverlet Crayfish	Hobbseus valleculus
130.	Cirolanid Isopod	Arubolana aruboides
131.	Clanton's Cave Amphipod	Stygobromus clantoni
132.	Clifton Cave Isopod	Caecidotea barri
Featured Articles: Eight Species Declared Extinct But May Still be Out There Eight Inexpensive Ways You Can Help Endangered Species The Seven Sea Turtle Species of the World Photos that will make you think twice before littering More articles
133.	Clinothelphusa kakoota	Clinothelphusa kakoota
134.	Coahuila Isopod	Mexistenasellus coahuila
135.	Coastal Flatwoods Crayfish	Procambarus apalachicolae
136.	Coastal Lowland Cave Crayfish	Procambarus leitheuseri
137.	Coccusa cristicervix	Coccusa cristicervix
138.	Cocoharpinia iliffei	Cocoharpinia iliffei
139.	Common Yabby	Cherax destructor
140.	Conasauga Blue Burrower	Cambarus cymatilis
141.	Conservancy Fairy Shrimp	Branchinecta conservatio
142.	Cooper's Cave Amphipod	Stygobromus cooperi
143.	Coosawattae Crayfish	Cambarus coosawattae
144.	Corrollton Crayfish	Procambarus connus
145.	Cryptopotamon anacoluthon	Cryptopotamon anacoluthon
146.	Cuban Cave Shrimp	Barbouria cubensis
147.	Curassanthura bermudensis	Curassanthura bermudensis
148.	Cypress Crayfish	Cambarellus blacki
149.	Deckenia imitatrix	Deckenia imitatrix
150.	Deckenia mitis	Deckenia mitis
151.	Delaware County Cave Crayfish	Cambarus subterraneus
152.	Devil's Sinkhole Amphipod	Stygobromus hadenoecus
153.	Diminutive Amphipod	Gammarus hyalelloides
154.	Distocambarus devexus	Distocambarus devexus
Featured Articles: Ten creatures that may become extinct in the next 10 years 10 Unusually White Creatures You'll Probably Never See in Real Life The Seven Sea Turtle Species of the World Rare Black Panther Seen Alive in Kenya More articles
155.	Distocambarus youngineri	Distocambarus youngineri
156.	Doimon doichiangdao	Doimon doichiangdao
157.	Doimon doisutep	Doimon doisutep
158.	Dussartius baeticus	Dussartius baeticus
159.	Dwarf River Crab	Liberonautes nanoides
160.	Edisto Crayfish	Procambarus echinatus
161.	Elaphoidella amabilis	Elaphoidella amabilis
162.	Elaphoidella franci	Elaphoidella franci
163.	Elaphoidella jeanneli	Elaphoidella jeanneli
164.	Elaphoidella kieferi	Elaphoidella kieferi
165.	Elevated Spring Amphipod	Stygobromus elatus
166.	Elk River Crayfish	Cambarus elkensis
167.	Elsalvadoria zurstrasseni	Elsalvadoria zurstrasseni
168.	Engaewa similis	Engaewa similis
169.	Eodiaptomus lumholtzi	Eodiaptomus lumholtzi
170.	Eodiaptomus shihi	Eodiaptomus shihi
171.	Eoleptestheria spinosa	Eoleptestheria spinosa
172.	Ephemeral Cave Amphipod	Stygobromus ephemerus
173.	Epilobocera haytensis	Epilobocera haytensis
174.	Epilobocera wetherbeei	Epilobocera wetherbeei
175.	Epischura baikalensis	Epischura baikalensis
176.	Erebonectes nesioticus	Erebonectes nesioticus
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo Twelve Incredibly Odd Endangered Creatures Captive cheetah gives birth to largest litter ever recorded The Seven Sea Turtle Species of the World More articles
177.	Escambia Crayfish	Procambarus escambiensis
178.	Etowah Crayfish	Cambarus fasciatus
179.	Eucrenonaspides oinotheke	Eucrenonaspides oinotheke
180.	Ezell's Cave Amphipod	Stygobromus flagellatus
181.	Fabaeformiscandona aemonae	Fabaeformiscandona aemonae
182.	Fibulacamptus bisetosus	Fibulacamptus bisetosus
183.	Fibulacamptus gracilior	Fibulacamptus gracilior
184.	Florida Cave Amphipod	Crangonyx grandimanus
185.	Florida Cave Shrimp	Palaemonetes cummingi
186.	Florida Fairy Shrimp	Dexteria floridana
187.	Fredius granulatus	Fredius granulatus
188.	French Broad Crayfish	Cambarus reburrus
189.	Geithusa pulchra	Geithusa pulchra
190.	Geothelphusa levicervix	Geothelphusa levicervix
191.	Geothelphusa miyakoensis	Geothelphusa miyakoensis
192.	Giant Freshwater Crayfish	Astacopsis gouldi
193.	Grady's Cave Amphipod	Stygobromus gradyi
194.	Grandbassa River Crab	Liberonautes grandbassa
195.	Green Crab	Geothelphusa lutao
196.	Greenbrier Cave Amphipod	Stygobromus emarginatus
197.	Greenbrier Cave Crayfish	Cambarus nerterius
198.	Greensboro Burrowing Crayfish	Cambarus catagius
Featured Articles: Ten creatures that may become extinct in the next 10 years 10 Unusually White Creatures You'll Probably Never See in Real Life Twelve Incredibly Odd Endangered Creatures The Seven Sea Turtle Species of the World More articles
199.	Hainanpotamon orientale	Hainanpotamon orientale
200.	Haplophthalmus abbreviatus	Haplophthalmus abbreviatus
201.	Haplophthalmus rhinoceros	Haplophthalmus rhinoceros
202.	Hara's Cave Amphipod	Stygobromus harai
203.	Hatchie Burrowing Crayfish	Fallicambarus hortoni
204.	Hay's Spring Amphipod	Stygobromus hayi
205.	Heliodiaptomus kolleruensis	Heliodiaptomus kolleruensis
206.	Heliodiaptomus pulcher	Heliodiaptomus pulcher
207.	Hell Creek Crayfish	Cambarus zophonastes
208.	Hemiboeckella powellensis	Hemiboeckella powellensis
209.	Hesperodiaptomus augustaensis	Hesperodiaptomus augustaensis
210.	Hesperodiaptomus californiensis	Hesperodiaptomus californiensis
211.	Heterothelphusa fatum	Heterothelphusa fatum
212.	Hickman's Pygmy Mountain Shrimp	Allanaspides hickmani
213.	Hiwassee Crayfish	Cambarus hiwasseensis
214.	Hiwassee Headwater Crayfish	Cambarus parrishi
215.	Hobb's Cave Amphipod	Crangonyx hobbsi
216.	Hobbseus cristatus	Hobbseus cristatus
217.	Hypolobocera exuca	Hypolobocera exuca
218.	Hypolobocera alata	Hypolobocera alata
219.	Hypolobocera andagoensis	Hypolobocera andagoensis
220.	Hypolobocera barbacensis	Hypolobocera barbacensis
Featured Articles: Eight Species Declared Extinct But May Still be Out There Rare white giraffes sighted for the first time in Kenya Eight Inexpensive Ways You Can Help Endangered Species Captive cheetah gives birth to largest litter ever recorded More articles
221.	Hypolobocera cajambrensis	Hypolobocera cajambrensis
222.	Hypolobocera gracilignatha	Hypolobocera gracilignatha
223.	Hypolobocera rathbuni	Hypolobocera rathbuni
224.	Hypolobocera rotundilobata	Hypolobocera rotundilobata
225.	Hypolobocera velezi	Hypolobocera velezi
226.	Ibanum pilimanus	Ibanum pilimanus
227.	Idunella sketi	Idunella sketi
228.	Illinois Cave Amphipod	Gammarus acherondytes
229.	Imnadia banatica	Imnadia banatica
230.	Imnadia cristata	Imnadia cristata
231.	Imnadia panonica	Imnadia panonica
232.	Indochinamon bhumibol	Indochinamon bhumibol
233.	Indochinamon villosum	Indochinamon villosum
234.	Indochinamon cua	Indochinamon cua
235.	Indochinamon guttum	Indochinamon guttum
236.	Indochinamon mieni	Indochinamon mieni
237.	Ingolfiella longipes	Ingolfiella longipes
238.	Iomon nan	Iomon nan
239.	Iomon luangprabangensis	Iomon luangprabangensis
240.	Irmengardia didacta	Irmengardia didacta
241.	Irmengardia nemestrinus	Irmengardia nemestrinus
242.	Irmengardia johnsoni	Irmengardia johnsoni
Featured Articles: Eight Species Declared Extinct But May Still be Out There Eight Inexpensive Ways You Can Help Endangered Species Captive cheetah gives birth to largest litter ever recorded Photos that will make you think twice before littering More articles
243.	Isolapotamon bauense	Isolapotamon bauense
244.	Jackson Prarie Crayfish	Procambarus barbiger
245.	Jefferson County Crayfish	Fallicambarus gilpini
246.	Johora punicea	Johora punicea
247.	Johora singaporensis	Johora singaporensis
248.	Johora counsilmani	Johora counsilmani
249.	Johora gapensis	Johora gapensis
250.	Johora johorensis	Johora johorensis
251.	Johora thoi	Johora thoi
252.	Johora tiomanensis	Johora tiomanensis
253.	Kapcypriodopsis barnardi	Kapcypriodopsis barnardi
254.	Kauai Cave Amphipod	Spelaeorchestia koloana
255.	Kentucky Cave Shrimp	Palaemonias ganteri
256.	Lagniappe Crayfish	Procambarus lagniappe
257.	Least Crayfish	Cambarellus diminutus
258.	Lee County Cave Isopod	Lirceus usdagalun
259.	Lepidothelphusa cognetti	Lepidothelphusa cognetti
260.	Leptocaris stromatolicolus	Leptocaris stromatolicolus
261.	Leucocythere helenae	Leucocythere helenae
262.	Lindacatalina sumacensis	Lindacatalina sumacensis
263.	Liotelphusa gagei	Liotelphusa gagei
264.	Liotelphusa laevis	Liotelphusa laevis
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo 10 Unusually White Creatures You'll Probably Never See in Real Life Eight Inexpensive Ways You Can Help Endangered Species Photos that will make you think twice before littering More articles
265.	Liotelphusa quadrata	Liotelphusa quadrata
266.	Little Tennessee Crayfish	Cambarus georgiae
267.	Lobster Claw Crab	Liberonautes rubigimanus
268.	Long-legged Cave Amphipod	Stygobromus longipes
269.	Longhorn Fairy Shrimp	Branchinecta longiantenna
270.	Lonoke Crayfish	Procambarus ferrugineus
271.	Louisea balssi	Louisea balssi
272.	Louisea edeaensis	Louisea edeaensis
273.	Lovenula excellens	Lovenula excellens
274.	Lovenula simplex	Lovenula simplex
275.	Lugbe River Crab	Liberonautes lugbe
276.	Mackenzie's Cave Amphipod	Stygobromus mackenziei
277.	Madagapotamon humberti	Madagapotamon humberti
278.	Madison Cave Isopod	Antrolana lira
279.	Mahatha helaya	Mahatha helaya
280.	Mahatha iora	Mahatha iora
281.	Mahatha lacuna	Mahatha lacuna
282.	Mahatha regina	Mahatha regina
283.	Mainitia mainitensis	Mainitia mainitensis
284.	Malayopotamon granulatum	Malayopotamon granulatum
285.	Malheur Cave Amphipod	Stygobromus hubbsi
286.	Marron	Cherax tenuimanus
Featured Articles: 10 Unusually White Creatures You'll Probably Never See in Real Life Twelve Incredibly Odd Endangered Creatures Eight Inexpensive Ways You Can Help Endangered Species Captive cheetah gives birth to largest litter ever recorded More articles
287.	Mastigodiaptomus purpureus	Mastigodiaptomus purpureus
288.	Maydelliathelphusa edentula	Maydelliathelphusa edentula
289.	Mekhongthelphusa kengsaphu	Mekhongthelphusa kengsaphu
290.	Mekhongthelphusa tetragona	Mekhongthelphusa tetragona
291.	Mesocyclops insulensis	Mesocyclops insulensis
292.	Metacyclops gasparoi	Metacyclops gasparoi
293.	Metacyclops postojnae	Metacyclops postojnae
294.	Metadiaptomus capensis	Metadiaptomus capensis
295.	Metadiaptomus purcelli	Metadiaptomus purcelli
296.	Metatrichoniscoides celticus	Metatrichoniscoides celticus
297.	Mexilana saluposi	Mexilana saluposi
298.	Mexistenasellus nulemex	Mexistenasellus nulemex
299.	Miami Cave Crayfish	Procambarus milleri
300.	Microthelphusa forcarti	Microthelphusa forcarti
301.	Mictacean	Mictocaris halope
302.	Migmathelphusa olivacea	Migmathelphusa olivacea
303.	Minute Cave Amphipod	Stygobromus parvus
304.	Mississippi Flatwoods Crayfish	Procambarus cometes
305.	Miyazaki's Crab	Geothelphusa miyazakii
306.	Mona Cave Shrimp	Typhlatya monae
307.	Monolistra bolei	Monolistra bolei
308.	Monolistra spinosissima	Monolistra spinosissima
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo 10 Unusually White Creatures You'll Probably Never See in Real Life The Seven Sea Turtle Species of the World Rare Black Panther Seen Alive in Kenya More articles
309.	Monolistra calopyge	Monolistra calopyge
310.	Monolistra schottlaenderi	Monolistra schottlaenderi
311.	Moritschus altaquerensis	Moritschus altaquerensis
312.	Moritschus ecuadorensis	Moritschus ecuadorensis
313.	Morrison's Cave Amphipod	Stygobromus morrisoni
314.	Moserius percoi	Moserius percoi
315.	Mountain Cave Amphipod	Stygobromus montanus
316.	Muckalee Crayfish	Procambarus gibbus
317.	Nanocopia minuta	Nanocopia minuta
318.	Nautilothelphusa zimmeri	Nautilothelphusa zimmeri
319.	Neches Crayfish	Procambarus nechesae
320.	Nemoron nomas	Nemoron nomas
321.	Neodiaptomus intermedius	Neodiaptomus intermedius
322.	Neodiaptomus laii	Neodiaptomus laii
323.	Neodiaptomus lymphatus	Neodiaptomus lymphatus
324.	Neodiaptomus physalipus	Neodiaptomus physalipus
325.	Neopseudothelphusa fossor	Neopseudothelphusa fossor
326.	Neostrengeria perijaensis	Neostrengeria perijaensis
327.	Newnhamia fuscata	Newnhamia fuscata
328.	Newnhamia insolita	Newnhamia insolita
329.	Nickajack Cave Isopod	Caecidotea nickajackensis
330.	Nimba Stream Crab	Liberonautes nimba
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo 10 Unusually White Creatures You'll Probably Never See in Real Life Rare white giraffes sighted for the first time in Kenya Eight Inexpensive Ways You Can Help Endangered Species More articles
331.	Niphargobates lefkodemonaki	Niphargobates lefkodemonaki
332.	Niphargobates orophobata	Niphargobates orophobata
333.	Niphargus aberrans	Niphargus aberrans
334.	Niphargus hadzii	Niphargus hadzii
335.	Niphargus hrabei	Niphargus hrabei
336.	Niphargus sphagnicolus	Niphargus sphagnicolus
337.	Niphargus spoeckeri	Niphargus spoeckeri
338.	Niphargus stenopus	Niphargus stenopus
339.	Niphargus timavi	Niphargus timavi
340.	Niphargus valachicus	Niphargus valachicus
341.	Nitocrella slovenica	Nitocrella slovenica
342.	Nitocrella stochi	Nitocrella stochi
343.	Noel's Amphipod	Gammarus desperatus
344.	Norton's Cave Amphipod	Stygobromus nortoni
345.	Notodiaptomus dubius	Notodiaptomus dubius
346.	Notodiaptomus maracaibensis	Notodiaptomus maracaibensis
347.	Nueces Crayfish	Procambarus nueces
348.	Obey Crayfish	Cambarus obeyensis
349.	Oconee Burrowing Crayfish	Cambarus truncatus
350.	Oconee Stream Crayfish	Cambarus chaugaensis
351.	Okinawan Terrestrial Crab	Geothelphusa tenuimanus
352.	Oklahoma Cave Amphipod	Allocrangonyx pellucidus
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo Twelve Incredibly Odd Endangered Creatures Eight Inexpensive Ways You Can Help Endangered Species Rare Black Panther Seen Alive in Kenya More articles
353.	Oklahoma Cave Crayfish	Cambarus tartarus
354.	Oktibbeha Riverlet Crayfish	Hobbseus orconectoides
355.	Onchotelson brevicaudatus	Onchotelson brevicaudatus
356.	Onchotelson spatulatus	Onchotelson spatulatus
357.	Onondaga Cave Amphipod	Stygobromus onondagaensis
358.	Opossum Shrimp	Bermudamysis speluncola
359.	Orange Lake Cave Crayfish	Procambarus franzi
360.	Orchid Island Crab	Geothelphusa lanyu
361.	Orconectes shoupi	Orconectes shoupi
362.	Orconectes saxatilis	Orconectes saxatilis
363.	Orconectes bisectus	Orconectes bisectus
364.	Orconectes blacki	Orconectes blacki
365.	Orconectes cooperi	Orconectes cooperi
366.	Orconectes deanae	Orconectes deanae
367.	Orconectes hartfieldi	Orconectes hartfieldi
368.	Orconectes holti	Orconectes holti
369.	Orconectes incomptus	Orconectes incomptus
370.	Orconectes jeffersoni	Orconectes jeffersoni
371.	Orconectes jonesi	Orconectes jonesi
372.	Orconectes kentuckiensis	Orconectes kentuckiensis
373.	Orconectes maletae	Orconectes maletae
374.	Orconectes marchandi	Orconectes marchandi
Featured Articles: Eight Species Declared Extinct But May Still be Out There Twelve Incredibly Odd Endangered Creatures Rare white giraffes sighted for the first time in Kenya Captive cheetah gives birth to largest litter ever recorded More articles
375.	Orconectes menae	Orconectes menae
376.	Orconectes mississippiensis	Orconectes mississippiensis
377.	Orconectes peruncus	Orconectes peruncus
378.	Orconectes quadruncus	Orconectes quadruncus
379.	Orconectes sloanii	Orconectes sloanii
380.	Orconectes stannardi	Orconectes stannardi
381.	Orconectes wrighti	Orconectes wrighti
382.	Orlando Cave Crayfish	Procambarus acherontis
383.	Ouachita Burrowing Crayfish	Fallicambarus harpi
384.	Ozark Cave Amphipod	Stygobromus ozarkensis
385.	Oziothelphusa dakuna	Oziothelphusa dakuna
386.	Oziothelphusa gallicola	Oziothelphusa gallicola
387.	Oziothelphusa intuta	Oziothelphusa intuta
388.	Oziothelphusa kodagoda	Oziothelphusa kodagoda
389.	Oziothelphusa populosa	Oziothelphusa populosa
390.	Oziothelphusa biloba	Oziothelphusa biloba
391.	Oziothelphusa hippocastanum	Oziothelphusa hippocastanum
392.	Oziothelphusa ritigala	Oziothelphusa ritigala
393.	Oziothelphusa stricta	Oziothelphusa stricta
394.	Oziothelphusa wagrakarowensis	Oziothelphusa wagrakarowensis
395.	Panama City Crayfish	Procambarus econfinae
396.	Paracyclopia naessi	Paracyclopia naessi
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Orphaned cougar cubs progressing well at Toledo Zoo Rare Black Panther Seen Alive in Kenya More articles
397.	Paradiaptomus natalensis	Paradiaptomus natalensis
398.	Paramelita barnardi	Paramelita barnardi
399.	Paramelita flexa	Paramelita flexa
400.	Paramorariopsis anae	Paramorariopsis anae
401.	Parapotamon spinescens	Parapotamon spinescens
402.	Parathelphusa batamensis	Parathelphusa batamensis
403.	Parathelphusa nagasakti	Parathelphusa nagasakti
404.	Parathelphusa reticulata	Parathelphusa reticulata
405.	Parathelphusa balabac	Parathelphusa balabac
406.	Parathelphusa cabayugan	Parathelphusa cabayugan
407.	Parathelphusa crocea	Parathelphusa crocea
408.	Parathelphusa maindroni	Parathelphusa maindroni
409.	Parathelphusa ovum	Parathelphusa ovum
410.	Parathelphusa pantherina	Parathelphusa pantherina
411.	Parathelphusa possoensis	Parathelphusa possoensis
412.	Parathelphusa sarasinorum	Parathelphusa sarasinorum
413.	Parhippolyte sterreri	Parhippolyte sterreri
414.	Parkhill Prairie Crayfish	Procambarus steigmani
415.	Parzefall's Stenasellid	Mexistenasellus parzefalli
416.	Pastilla dacuna	Pastilla dacuna
417.	Pearl Riverlet Crayfish	Hobbseus attenuatus
418.	Peck's Cave Amphipod	Stygobromus pecki
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Rare white giraffes sighted for the first time in Kenya The Seven Sea Turtle Species of the World More articles
419.	Pecos Amphipod	Gammarus pecos
420.	Pennsylvania Cave Amphipod	Crangonyx dearolfi
421.	Perbrinckia cracens	Perbrinckia cracens
422.	Perbrinckia enodis	Perbrinckia enodis
423.	Perbrinckia fido	Perbrinckia fido
424.	Perbrinckia gabadagei	Perbrinckia gabadagei
425.	Perbrinckia glabra	Perbrinckia glabra
426.	Perbrinckia morayensis	Perbrinckia morayensis
427.	Perbrinckia punctata	Perbrinckia punctata
428.	Perbrinckia quadratus	Perbrinckia quadratus
429.	Perbrinckia rosae	Perbrinckia rosae
430.	Perbrinckia scitula	Perbrinckia scitula
431.	Perbrinckia fenestra	Perbrinckia fenestra
432.	Perbrinckia integra	Perbrinckia integra
433.	Phantom Cave Crayfish	Procambarus pecki
434.	Phricotelphusa gracilipes	Phricotelphusa gracilipes
435.	Phricotelphusa hockpingi	Phricotelphusa hockpingi
436.	Phricotelphusa callianira	Phricotelphusa callianira
437.	Phricotelphusa elegans	Phricotelphusa elegans
438.	Phricotelphusa limula	Phricotelphusa limula
439.	Phricotelphusa ranongi	Phricotelphusa ranongi
440.	Phrygiopilus acanthophallus	Phrygiopilus acanthophallus
Featured Articles: Eight Species Declared Extinct But May Still be Out There Orphaned cougar cubs progressing well at Toledo Zoo Eight Inexpensive Ways You Can Help Endangered Species Captive cheetah gives birth to largest litter ever recorded More articles
441.	Phyllodiaptomus wellekensae	Phyllodiaptomus wellekensae
442.	Pickle Springs Amphipod	Stygobromus heteropodus
443.	Piedmont Blue Burrower	Cambarus harti
444.	Pingtung Crab	Geothelphusa pingtung
445.	Pizzini's Amphipod	Stygobromus pizzinii
446.	Platyops sterreri	Platyops sterreri
447.	Potamocarcinus hartmanni	Potamocarcinus hartmanni
448.	Potamocarcinus roatensis	Potamocarcinus roatensis
449.	Potamon bileki	Potamon bileki
450.	Potamon fluviatile	Potamon fluviatile
451.	Potamon ibericum	Potamon ibericum
452.	Potamon potamios	Potamon potamios
453.	Potamon rhodium	Potamon rhodium
454.	Potamon setiger	Potamon setiger
455.	Potamonautes gonocristatus	Potamonautes gonocristatus
456.	Potamonautes idjiwiensis	Potamonautes idjiwiensis
457.	Potamonautes mutandensis	Potamonautes mutandensis
458.	Potamonautes platycentron	Potamonautes platycentron
459.	Potamonautes choloensis	Potamonautes choloensis
460.	Potamonautes gerdalensis	Potamonautes gerdalensis
461.	Potamonautes ignestii	Potamonautes ignestii
462.	Potamonautes infravallatus	Potamonautes infravallatus
Featured Articles: Eight Species Declared Extinct But May Still be Out There Orphaned cougar cubs progressing well at Toledo Zoo Captive cheetah gives birth to largest litter ever recorded Rare Black Panther Seen Alive in Kenya More articles
463.	Potamonautes lividus	Potamonautes lividus
464.	Potamonautes montivagus	Potamonautes montivagus
465.	Potamonautes pilosus	Potamonautes pilosus
466.	Potamonautes raybouldi	Potamonautes raybouldi
467.	Potamonautes reidi	Potamonautes reidi
468.	Potamonautes triangulus	Potamonautes triangulus
469.	Potamonautes unisulcatus	Potamonautes unisulcatus
470.	Potamonautes xiphoidus	Potamonautes xiphoidus
471.	Pristine Crayfish	Cambarus pristinus
472.	Proasellus parvulus	Proasellus parvulus
473.	Proasellus slovenicus	Proasellus slovenicus
474.	Procambarus latipleurum	Procambarus latipleurum
475.	Procambarus plumimanus	Procambarus plumimanus
476.	Procambarus rathbunae	Procambarus rathbunae
477.	Procambarus reimeri	Procambarus reimeri
478.	Procarid Shrimp	Procaris chacei
479.	Pseudocandona cavicola	Pseudocandona cavicola
480.	Pseudocandona pretneri	Pseudocandona pretneri
481.	Pseudocandona trigonelia	Pseudocandona trigonelia
482.	Pseudomoraria triglavensis	Pseudomoraria triglavensis
483.	Ptychophallus tristani	Ptychophallus tristani
484.	Pupamon phrae	Pupamon phrae
Featured Articles: Eight Species Declared Extinct But May Still be Out There Twelve Incredibly Odd Endangered Creatures Rare white giraffes sighted for the first time in Kenya Captive cheetah gives birth to largest litter ever recorded More articles
485.	Purple Marsh Crab	Afrithelphusa monodosa
486.	Putnam County Cave Crayfish	Procambarus morrisi
487.	Raddaus mertensi	Raddaus mertensi
488.	Red-black Crayfish	Cambarus pyronotus
489.	Redclaw Crayfish	Cherax quadricarinatus
490.	Reddell's Cave Amphipod	Stygobromus reddelli
491.	Rhynchochydorus australiensis	Rhynchochydorus australiensis
492.	Rodriguezus trujillensis	Rodriguezus trujillensis
493.	Rusty Grave Digger	Cambarus miltus
494.	Rye Cove Cave Isopod	Lirceus culveri
495.	Sachs's Stream Crab	Potamonemus sachsi
496.	Salangathelphusa anophrys	Salangathelphusa anophrys
497.	Saline Burrowing Crayfish	Fallicambarus strawni
498.	San Diego Fairy Shrimp	Branchinecta sandiegonensis
499.	Sandhills Crayfish	Procambarus angustatus
500.	Santa Fe Cave Crayfish	Procambarus erythrops
501.	Sayamia melanodactylus	Sayamia melanodactylus
502.	Sayamia maehongsonensis	Sayamia maehongsonensis
503.	Seed Shrimp	Limnocythere porphyretica
504.	Shasta Crayfish	Pacifastacus fortis
505.	Siamthelphusa holthuisi	Siamthelphusa holthuisi
506.	Silver Glen Springs Cave Crayfish	Procambarus attiguus
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Rare white giraffes sighted for the first time in Kenya Photos that will make you think twice before littering More articles
507.	Sinopotamon ebianense	Sinopotamon ebianense
508.	Sinopotamon hanyangense	Sinopotamon hanyangense
509.	Skistodiaptomus carolinensis	Skistodiaptomus carolinensis
510.	Slenderwrist Burrowing Crayfish	Fallicambarus petilicarpus
511.	Socorro Isopod	Thermosphaeroma thermophilum
512.	Somanniathelphusa zanklon	Somanniathelphusa zanklon
513.	Sooty Crayfish	Pacifastacus nigrescens
514.	South Australia Crab	Geothelphusa nanao
515.	Speckled Burrowing Crayfish	Fallicambarus danielae
516.	Spelaeoecia bermudensis	Spelaeoecia bermudensis
517.	Speleoithona bermudensis	Speleoithona bermudensis
518.	Speleophria bivexilla	Speleophria bivexilla
519.	Speleophria scottodicarloi	Speleophria scottodicarloi
520.	Speocirolana thermydromis	Speocirolana thermydromis
521.	Sphaerolana affinis	Sphaerolana affinis
522.	Sphaerolana interstitialis	Sphaerolana interstitialis
523.	Sphaerolana karenae	Sphaerolana karenae
524.	Spiny Crayfish	Euastacus bindal
525.	Spiny Crayfish	Euastacus crassus
526.	Spiny Crayfish	Euastacus diversus
527.	Spiny Crayfish	Euastacus jagara
528.	Spiny Crayfish	Euastacus maidae
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo Twelve Incredibly Odd Endangered Creatures Captive cheetah gives birth to largest litter ever recorded The Seven Sea Turtle Species of the World More articles
529.	Spiny Crayfish	Euastacus monteithorum
530.	Spiny Crayfish	Euastacus robertsi
531.	Spiny Crayfish	Euastacus urospinosus
532.	Spiny Crayfish	Euastacus yigara
533.	Spiny Crayfish	Euastacus armatus
534.	Spiny Crayfish	Euastacus bispinosus
535.	Spiny Crayfish	Euastacus eungella
536.	Spiny Crayfish	Euastacus fleckeri
537.	Spiny Crayfish	Euastacus hystricosus
538.	Spiny Crayfish	Euastacus neodiversus
539.	Spiny Crayfish	Euastacus setosus
540.	Spiny-tail Crayfish	Procambarus fitzpatricki
541.	Spiralothelphusa fernandoi	Spiralothelphusa fernandoi
542.	Spiralothelphusa parvula	Spiralothelphusa parvula
543.	Spring Cave Amphipod	Stygobromus spinatus
544.	Stellmack's Cave Amphipod	Stygobromus stellmacki
545.	Stelomon erawanense	Stelomon erawanense
546.	Stelomon kanchanaburiense	Stelomon kanchanaburiense
547.	Stoliczia chaseni	Stoliczia chaseni
548.	Stoliczia bella	Stoliczia bella
549.	Stoliczia changmanae	Stoliczia changmanae
550.	Stoliczia cognata	Stoliczia cognata
Featured Articles: Orphaned cougar cubs progressing well at Toledo Zoo Twelve Incredibly Odd Endangered Creatures Eight Inexpensive Ways You Can Help Endangered Species Captive cheetah gives birth to largest litter ever recorded More articles
551.	Stoliczia goal	Stoliczia goal
552.	Stoliczia karenae	Stoliczia karenae
553.	Stoliczia kedahensis	Stoliczia kedahensis
554.	Stoliczia leoi	Stoliczia leoi
555.	Stoliczia pahangensis	Stoliczia pahangensis
556.	Stoliczia panhai	Stoliczia panhai
557.	Stoliczia perlensis	Stoliczia perlensis
558.	Stoliczia tweedei	Stoliczia tweedei
559.	Stone Crayfish	Austropotamobius torrentium
560.	Strengeriana antioquensis	Strengeriana antioquensis
561.	Streptocephalus woottoni	Streptocephalus woottoni
562.	Streptocephalus moorei	Streptocephalus moorei
563.	Streptocephalus dendrophorus	Streptocephalus dendrophorus
564.	Streptocephalus dendyi	Streptocephalus dendyi
565.	Streptocephalus gracilis	Streptocephalus gracilis
566.	Streptocephalus guzmani	Streptocephalus guzmani
567.	Streptocephalus zuluensis	Streptocephalus zuluensis
568.	Stygodiaptomus kieferi	Stygodiaptomus kieferi
569.	Stygodiaptomus petkovskii	Stygodiaptomus petkovskii
570.	Stygothelphusa bidiensis	Stygothelphusa bidiensis
571.	Subtle Cave Amphipod	Stygobromus subtilis
572.	Sundathelphusa sottoae	Sundathelphusa sottoae
Featured Articles: 10 Unusually White Creatures You'll Probably Never See in Real Life Captive cheetah gives birth to largest litter ever recorded The Seven Sea Turtle Species of the World Rare Black Panther Seen Alive in Kenya More articles
573.	Sundathelphusa minahassae	Sundathelphusa minahassae
574.	Sundathelphusa rubra	Sundathelphusa rubra
575.	Syncarid Shrimp	Allanaspides helonomus
576.	Taiwan Waist Crab	Somanniathelphusa taiwanensis
577.	Taiwan's South China Sea River Crab	Nanhaipotamon formosanum
578.	Taroko Crab	Geothelphusa taroko
579.	Tasmanian Anaspid Crustacean	Paranaspides lacustris
580.	Tehuana lamothei	Tehuana lamothei
581.	Tehuana poglayenorum	Tehuana poglayenorum
582.	Tehuana veracruzana	Tehuana veracruzana
583.	Terrathelphusa kuchingensis	Terrathelphusa kuchingensis
584.	Thaksinthelphusa yongchindaratae	Thaksinthelphusa yongchindaratae
585.	Thermodiaptomus galeboides	Thermodiaptomus galeboides
586.	Thermosphaeroma cavicauda	Thermosphaeroma cavicauda
587.	Thermosphaeroma dugesi	Thermosphaeroma dugesi
588.	Thermosphaeroma macrura	Thermosphaeroma macrura
589.	Thermosphaeroma milleri	Thermosphaeroma milleri
590.	Thermosphaeroma smithi	Thermosphaeroma smithi
591.	Tidewater Interstitial Amphipod	Stygobromus araeus
592.	Tidewater Stygonectid Amphipod	Stygobromus identatus
593.	Tiwaripotamon edostilus	Tiwaripotamon edostilus
594.	Tombigbee Riverlet Crayfish	Hobbseus petilus
Featured Articles: Ten creatures that may become extinct in the next 10 years 10 Unusually White Creatures You'll Probably Never See in Real Life Rare white giraffes sighted for the first time in Kenya Eight Inexpensive Ways You Can Help Endangered Species More articles
595.	Tree Hole Crab	Globonautes macropus
596.	Trichodactylus crassus	Trichodactylus crassus
597.	Troglocaris anophthalmus	Troglocaris anophthalmus
598.	Tropocyclops federensis	Tropocyclops federensis
599.	Tropocyclops nananae	Tropocyclops nananae
600.	Tropodiaptomus burundensis	Tropodiaptomus burundensis
601.	Tropodiaptomus kilimensis	Tropodiaptomus kilimensis
602.	Tropodiaptomus kissi	Tropodiaptomus kissi
603.	Tropodiaptomus neumanni	Tropodiaptomus neumanni
604.	Tropodiaptomus simplex	Tropodiaptomus simplex
605.	Tropodiaptomus stuhlmanni	Tropodiaptomus stuhlmanni
606.	Typhlopseudothelphusa mocinoi	Typhlopseudothelphusa mocinoi
607.	Uramphisopus pearsoni	Uramphisopus pearsoni
608.	Valley Flame Crayfish	Cambarus deweesae
609.	Vernal Pool Fairy Shrimp	Branchinecta lynchi
610.	Vernal Pool Tadpole Shrimp	Lepidurus packardi
611.	Wang's Crab	Geothelphusa wangi
612.	Water Flea	Daphnia coronata
613.	Water Flea	Daphnia jollyi
614.	Water Flea	Daphnia nivalis
615.	Water Flea	Daphnia occidentalis
616.	Wengeror's Cave Amphipod	Stygobromus wengerorum
Featured Articles: Eight Species Declared Extinct But May Still be Out There Ten creatures that may become extinct in the next 10 years Orphaned cougar cubs progressing well at Toledo Zoo Rare white giraffes sighted for the first time in Kenya More articles
617.	White-clawed Crayfish	Austropotamobius pallipes
618.	Wilken's Stenasellid	Mexistenasellus wilkensi
619.	Wisconsin Well Amphipod	Stygobromus putealis
620.	Woodville Cave Crayfish	Procambarus orcinus
621.	Wutai Crab	Geothelphusa wutai
622.	Yalobusha Riverlet Crayfish	Hobbseus yalobushensis
623.	Yangmingshan Crab	Geothelphusa yangminshan
624.	Ze Concept Of Crab	Geothelphusa takuan
625.	Zonocypretta kalimna	Zonocypretta kalimna