The Jullien's golden carp is found in the Chao Phraya and Mekong basins of Indo-China and Thailand, and the Pahang and Perak basins of Malaysia. This fish is very large, weighing up to 154 lb and measuring up to 4.9 feet long. Its body is brown to red in color with dark brown stripes. The fins and tail are orange, and it has a rounded snout with small lips. Carps are freshwater fish and are distantly related to the common goldfish.
The Jullien's golden carp is a migratory species and mainly occupies large rivers or lakes with moving water, with sand or gravel substrates and where there is an abundance of mollusks. These fish feed on aquatic plants, insects, and shelled mollusks. They migrate upstream in October, and spawning occurs in the winter in late December through early February in big riverine deltas where the current is strong enough.
The Jullien's golden carp is threatened by overfishing and human capture of eggs that have a very high market price. The species is legally protected in Laos where it is forbidden to catch, trade, or transport the species.