I KEEP FINDING DEAD GOLDFISH. EITHER FISH ALL INTACT OR WITH THEIR HEAD OR STOMACH MISSING. ALL FEMALE - WE RECENTLY PUT A KOI OF TRIPLE THEIR SIZE. COULD HE BE HURTING OR KILLING THEM? - BUDD Koi and goldfish are both docile, so they get along good. A predator is probably getting in your pond and hurting your fish. Share: Del.icio.us Digg Reddit