Vertebrates in the same class as a catfish?

Catfish belong to the class Actinopterygii, which is the class of ray-finned fishes. So, all other ray-finned fishes are in the same class as a catfish.

Here are some examples of ray-finned fish that share the same class as a catfish:

* Salmon

* Tuna

* Trout

* Guppies

* Goldfish

* Piranhas

* Eels

* Clownfish

Essentially, almost all the fish you see in aquariums and in the sea are in the same class as a catfish. The only fish not in this class are those with fleshy fins, like lungfish and coelacanths.