Hi, I know this is a very sad topic, and even a tougher decision for me, but if I could get some advice, it would really help. I've had my first cichlid tank for about 8 months now. One of my cichlids sort of fell behind in the growth race, where most of my cichlids are now about 3-3.5 inches (one is practically 4 inches), and he around 2 inches. But he was equally agressive, and was able to fend for himself quite well, was eating fine; nothing seemed to be wrong. However the other day I went to feed my fish in the morning and noticed His tail was missing! A small part of his tail remained, but I could see extensions of bone sticking out. I immediately cleaned the tank and put him into a second tank (which someone told me was a bad idea, as I can no longer reintroduce him) I am a university student so I really don't have a world of time. But I cant stand seeing him like this. (Its been about a week since the incidence.) Should I euthanize him? Sorry for the long info, but I'm hoping it would give someone a better picture of whats going on. I'd really appreciate the help.