Siluriformes (Catfishes)

The order Siluiformes, which its members are commonly called catfish (catfishes for plural) and sometimes known as Kaari, is a group of ray-finned fish that has 'whiskers' or barbels near the mouth, which are used for detecting many things (depending on the species on what they use them for).

Not all catfish have barbels, but some fish are designated thus of their skull or swim bladder(s). A catfishes' barbels are commonly called 'whiskers' thus of resembling a cat's or guinea pig's whiskers. Some catfish have scales (such with most small aquarium kept catfish, such as Corydoras members) and some have no scales ("naked"), but have a thicker protection layer of slime. It is easier to see the resemblance of their 'whiskers' with larger species that has no scales (such as the channel catfish), thus of the whiskers' thickness.

Some catfish are bottom feeders (scavengers), while some are hunters. Most catfish are omnivores. Some such as the catfish goonch are carnivores.

Diversity
As mentioned above, some catfishes are omnivores (e.g. channel catfish; Corydoras members), with a few of them being carnivores (e.g. goonch). Some are bottom feeders or scavengers, which will eat waste, particles of flesh (on things such as sand, rock, in muck), greenery, and more. Some though are hunters, usually lurking in the bottom or in hiding spots/places (e.g. holes) or hunting in open water.