A Small Black spot

MY KOI HAS A SMALL BLACK SPOT. THE SPOT IS SITUATED BETWEEN THE TOP FIN AND THE TAIL. IS IT SOMETHING YOU SHOULD BE CONCERNED ABOUT? IF SO WHAT DO I TREAT IT WITH? -KEITH The black spot is probably what the Japanese call a shimi, a small discoloration. Shimis are a genetic flaw that are hard for the breeders to get rid of. They seem to be more prevalent on Koi that live in hard water. Watch your Koi with the black spot, if it starts acting funny, (ie. isolating itself, flashing, not eating), then it could have a serious health problem. Shimis themselves are completely harmless. Share: Del.icio.us Digg Reddit