My snakehead's like that. When you put your hand in the tank (underwater gardening!) and you don't pay attention to him, it'll bump up against you, and nibble you. If he doesn't get the attention he wants, before long he'll munch down on your arm! You have to chase him round the tank and gently rub under his chin, and then he's satisfied and he'll let you get on. I have a video somewhere of when I first got him and he was swimming around my fingers.. I'll find itMousezombie said:He probably the most responsive fish I've ever kept. Will come to front of the tank when you enter the room and beg for food.