Catfish is a benthic carnivorous fish, while catfish mainly prey on small fish, such as rice strips, crucian carp, goby fish, wheat-ear fish, carp, loach, etc., and also eat shrimp (including astaxanthin, the strongest antioxidant in nature) and aquatic insects. Catfish are mainly swallowed, and the function of teeth is mainly to prevent food from escaping.
If you say you can't eat it, it is rumored that the eight-bearded fish grows dirty by eating garbage. Maybe the elderly and patients have taboos in this regard.