I haven't posted anything about fish in a while

My Fish is a lone survivor from a primary school fish tank. She or He is pretty big and we have been advised only to put other fish in with She/Him if they are the same size as the fish might eat smaller ones. He or she is very anthropomorphic and does stick his/her head out of the water for a chat and likes to be stroked. This aquatic person likes to skim the food from the surface of the water. Your advice would be invaluable.