Bala shark
The bala shark is found in the Malay Peninsula, Sumatra, and Borneo. Some people say they have seen it further north in the Mekong and Chao Phraya River, but this is due to confusion with the recently described and possibly extinct B. ambusticauda (although the presence of any Balantiocheilos in the Mekong is not known). Bala sharks are found in midwater depths in large and medium-sized rivers and lakes. They feed on phytoplankton, but mostly on small crustaceans, rotifers, and insects and their larvae. Bala sharks are misunderstood aquarium fish. These fish are generally peaceful and good to many other types of tropical fish. Bala sharks are in most pet stores, but will grow to a size too large for the original aquarium.