i taught my eel to come out for food when ever I clap and whistle so yeah I like to train my fish. I like to think that fish are actually thinking because some fish (not guppies) especially my stripped raphy cat like to surveil the tank he also likes to look at me he spends most of his time in a small house that I sank for him and when I come up he comes to the window and looks at me. hes definately smart more than my dog she ust runs around eats and sleeps