I'm buying my buddies 29 gallon tank from him, but he has some fish in there I don't want. he has 5 african cichlids, a electric catfish, and a black lancer cat. Any of these could be mine if I wanted them but I'm affraid they will eat my little fish I already have (6 platies, 4 albino cory cats, 3 tetras, 2 kuhli loaches, 1 pleco). I really like the looks of the black lancer cat, but don't know how it will react to the little fish. I tried to look it up and found nothing. The cat is about 6" long and does nothing but hide upside down all day in a cave. Can I keep him or will he eat my other fish?