A catfish is an aquatic lifeform native to Earth. Some Human cultures eat cooked catfish.

Fried catfish was Commander Charles "Trip" Tucker's favorite meal. (ENT: "Unexpected")

When Captain Archer asked Trip if his mother would knew what his favorite meal is, he answered that she would give him her recipe for pan-fried catfish and wouldn't let him go until he promised that he won't screw up. (ENT: "Silent Enemy")

In 2152, upon believing the replicator at an automated repair station could replicate any food, the first thing Trip asked for was a "pan-fried catfish". The station found the genome and recipe in the Enterprise's database, and replicated it. (ENT: "Dead Stop")

In 2161, Chef was preparing the favorite food for every member of the Enterprise's crew, including Trip's favorite, catfish. He planned to supplement it with Edosian suckerfish, which resembled a catfish, but he wasn't sure if they tasted similar as well. (ENT: "These Are the Voyages...")