Erm...can u be more specific ???
The term "catfish" is not like erm...guppy.
It covers a big and wide range of fish species from carnivorous red-tail cats to the algae scouring common plec...not to mention those cute lil corydoras.

So whats urs supposed to be ? Any idea wat it is ?
Tiger Shovel Nose...Red Tail Cat...

If its a carnivorous predator, then feed it life food and some dead ones too.
Generally, catfishes are bottom feeders which usually are scavengers. So they will eat anything that can fit in their mouth...

I'm more into plecos...so can't help u much on predatorial cats...