I am not sure but i think his belly looks a little big to me ,he is acting normal swims fine.I picked up 2 oz of frozen brine shrimp yesterday from petco ,it is the first time i ever used it so maybe i fed him to much ,i will fast him for a couple of days and see if it helps.I remember reading about feeding him a frozen pea ,does the pea have to be cooked,or just defrosted.