I've been trying to feed my Hydrolycus Tatauaia for the passed two days and he will attack the goldfish as soon as I drop it in the tank then I'll try to get a picture and he just spits it out. Then I'll try to give him more and he won't even attack at them like he does the first one. It's really irritating me and I don't understand why he just won't eat them after I take a picture of him. The camera does not even have flash!!! What's wrong with him?