Answer :

DJSmartGuy95
Catfish rely mainly on organisms like smaller fish to feed on. This is their food source. This would mean that they rely on all organisms down the food chain, because if one dies, it would have a ripple effect all the way up to the catfish itself.
OnTheWii

Channel catfish are omnivorous and feed mostly at night on snails, insects, crawfish, algae, and plants. They have an excellent sense of smell to guide them and they are attracted to the foods with the strongest scent. Juvenile catfish eat small invertebrates and insect larvae. Their diet changes as they grow older.