Hi. I didn't realise until later that I'd actually got 2 males and a female silver tips from my lfs. the female tends to shoal alot with the neons and harlequins but the 2 males tend to stick together at the front of the tank. they seem to be really good mates and are always together. They are really active as soonas the lights come on and then once off, you hardly see them. They do chase the other tetras about the tank and even try withthe Rams and Silver Sharks but quickly dart the other way, once they get chased back. I wouldn't put them with slower moving fish but they are quite comical to watch. They always seem to be the instigaters for getting the other fish going until everyone is chasing each other around the tank for a mad "half hour".