The iridescent shark, iridescent shark catfish is a species of shark catfish native to the rivers of Southeast Asia. Despite its name, it is not a shark. It is found in the Mekong basin as well as the Chao Phraya River, and is heavily cultivated for food there. 

As far as their temperament goes these are peaceful and calm fish. They won't cause any trouble with other fish and rarely show signs of aggression. Sometimes when an iridescent shark gets scared they might dart or splash around a bit.