Question

Give examples of surface and bottom feeders of fishes used in fish culture

Answer 1

surface feeders of fishes are The Butterfly Fish, The Glass Catfish. etc 

bottom feeders of fishes are  demersal fish, groundfish, benthic fish. etc

Answer 2

Examples of bottom feeding fish species groups are flatfish (halibut, flounder, plaice, sole), eels, cod, haddock, bass, grouper, carp, bream (snapper) and some species of catfish and shark.
Examples of surface feeders are:Glass Catfish,Butterfly fish,silver hatchet fish etc.....