Wallago is a genus of catfishes (order Siluriformes) of the family Siluridae, or "sheatfish". They are found in rivers throughout southern Asia. Though the genus contains more than one species, the name "wallago" is also used as a common name for Wallago attu. They can grow up to 8 feet in the wild.

 

Their diet in the wild consists of smaller fish, crustaceans, and mollusks. Their mouth is filled with sharp teeth that point backwards so anything entering the mouth will never leave it.