yesterday i lost a goldfish, it was only about 2 inches long, but im more worried about how it died. i could not find it for a couple days and today i looked and realized that its body was floating on the side of the holding tank....i took it out and upon closer inspection i seen that it looked like it was missing scales on its side, and i mean like the scales were ripped off so that it only had skin....i have had it since april 10 and it has been fine and it wasn't until i added a koi about a week ago that it dissapeared...nothing is wrong with the other fish so that is why i assume it must have been attacked and the only culprit big enough to do that kind of harm had to of been the koi. i did not see the koi doing that to any other fish but im just kind of confused, i did not remember to take pictures of it before i threw it out though