What subgroup is a catfish?

A catfish belongs to the order Siluriformes.

Here's a breakdown of how that fits into the broader classification:

* Kingdom: Animalia

* Phylum: Chordata

* Class: Actinopterygii (ray-finned fishes)

* Order: Siluriformes (catfishes)

* Family: Varies depending on the specific catfish species (there are many families within the order Siluriformes)

So, while "catfish" is a general term, it refers to a fish belonging to the order Siluriformes.