When I go near the aquarium, the fishes that I am petsitting at the moment will swim towards me. When I put my hand above the aquarium, they will swim to the surface.
I think they know I am bringing them food. I wonder if fish has brain. I wonder if the fish can be conditioned like what Ivan Pavlov had done to his dog.
I like to play this trick with the fishies every morning, sometimes a few times in the morning, and I love watching them swimming so fast towards me. Early evening also works. I guess those are the time when they are hungry. So cute.
I am gonna miss them when they go home.