Well I got Nathan 2 weeks ago today. He is not scrawny and doing great. All I have been feeding him and other fish is one small pinch of flakes a day. I am not 100 percent this is how it happened but as a guess I think so. If you ever get a fish that does not want to eat. You need to stimulate it's appetite. As the p y t at Living Things in Chatham told me. Try Kent Garlic. ,??