Catfish have teeth. They have an inward-curving row of teeth on the top of the mouth that keeps prey from escaping the mouth. Catfish usually eat by gulping or suctioning the food into their mouths instead of biting and grasping the food.
Catfish are bottom-dwelling fish with flat heads covered with barbels that resemble a cat's whiskers. The barbels are covered with taste buds and are used to feel around in the dark and mud for food. Some catfish have taste buds located all over their bodies. Catfish eat practically anything.
There are many different species of catfish. Catfish either have no scales (naked) or are covered with armoured plating. They vary widely in size, from less than a half-inch to well over 100 pounds.