Mekong fish has fewer spines. The Mekong fish has no fin spines and only a few large spines in its body, while the catfish has fin spines outside its body and many small spines in its body, making it very inconvenient to use. Mekong fish, also called mango fish, is mainly born at the estuary of the Mekong River in Vietnam. It is a saltwater fish and a species of fish in the genus Mekong of the family Cyprinidae.