Also known as the Siamese Giant Carp, the giant barb is a critically endangered species of carp (Cyprinidae) which is known only from the Mae Klong, Mekong, and Chao Phraya river basins in Indonesia. In the wild, giant barb are often seen in big pools along the edges of large rivers, they will also seasonally enter smaller canals, floodplains and flooded forests. Young giant barb are also seen in smaller tributaries and swamps. True to their common name, giant barb can grow to large sizes. With adults growing up to 3m (9.8 ft), making them the largest Cyprinid in the world!
Currently, Catlocarpio siamensis is listed as Critically Endangered by the IUCN, as it faces major threats from habitat loss and over fishing. They have experienced a drastic decline in current years, with very few barb living to maturity in the wild.