Catfish are fresh water fish and they hide in the mud.
There are several saltwater catfish species, and these are sometimes prey for ospreys, pelicans, gannets, and boobies.
Many catfish species, like blue catfish and channel catfish, and flatheads, are predatory, feeding mainly on fishes.
Mostly other fish or dragonfly larva.
A shanny or blenny is sold commercially as Ocean Catfish It is a common food fish
It eats fish
It is real and has some other names. Such as Seawolf, Atlantic Catfish, Ocean Catfish, Wolf Eel or Sea Cat
A Large Catfish that lives the Amazon
Carpe
Catfish do not swim in the ocean, they are found in rivers, creeks, and fresh water ponds.
If you mean "crawfish", then the answer would be bigger fish like catfish.
it is digested
eel tail catfish
Puffer fish are eaten by sharks, dolphins, and some larger fish in the ocean.
whales