Thanks, I'll try to look, I think they all sing sometimes, but they all make different sounds, though all very loud, especially when Im trying to sleep. One of them is very fat I have noticed. ( i have 3) Is there any truth to saying that the males have a bumpier back with more black spots, while the females are a little smoother, with fewer spots? I think it would be cool of they bred. Sometimes I will see one hanging off the back of another. What temp does the water have to be for them to breed? Would I need to seperate them? I shouldnt get ahead of myself, I probably just have 3 gay males.