My one cichlid yesterday died after having what seemed like cancer. His skin deteriorated and he grew a large tumor on his reproductive organ. He passed away after hours of swimming upside down. I was upset, but knew because of it being cancer, it couldn't spread. Now, after looking at my other cichlid, I have noticed a large white spot on his reproductive organ and worry that it could grow into a tumor. It isn't fish warts. What the heck is affecting my fish. Sorry, my fish were not very camera friendly so I can not snap a photo.