haha thats mad, i got a jack myself half the size of that, and it still takes down goldies, mullet, herring, the same size as him, pretty much anything i put in their he will have it in his mouth, but ive heard goldfish have no protein in them just heaps of fat, he got real sick for a few days went really pale and just hid in his cave, from to much goldies, only feed him livies for a treat now, i also made the stupid mistake of putting my finger in thier to see if he attacked it, funnily enough he of course and hung and shaked his little heart out until he realised it was my finger,i was left with decent holes in my finger, and also left surged out my power from him splashing water behind the power point, dont think im doing that again....awsome to watch, also great fish