Se tu

History
The Se Tu fish is chubby and green with a broad face that has whiskers, but no lips. It has a short dorsal fin that goes from the top of its head all the way down its spine and two greenish-yellow fins on either side of its body. This fish also has a habit of repeatedly jumping high out of the water. This is a strange looking fish often said to have thoughtful eyes. It lives in the rivers of the Southern Earth Kingdom and has been known to grow to the size of full-grown man. These fish are the favorite food of the Platypus Bear. Once a year these fish swim hundreds of miles up river to spawn.

A Se Tu was first seen in "The Fortuneteller."

Connection
Although there are no solid green catfish like the one seen in Avatar, catfish inhabit freshwater habitats throughout the world. The Se Tu also is similar to the salmon in their spawning ritual.