Syncrossus hymenophysa (commonly known as tiger loach, tiger botia or green tiger loach) is a species of freshwater fish in the loach family Botiidae. It is native to fast mountain streams and large rivers, over soft substrates and often near submerged boulders and fallen trees, in Peninsular Malaysia, Borneo and Sumatra. Unlike most loaches, S. hymenophysa is very aggressive, especially when food is added to the tank.