Went to PETSMART yesterday to take my 3 and 6 yr old daughters on a day out with Dad and noticed that they had a small little female that looked like she might have a double tail. The fins were round one on top seperated with a space and one on bottom, didn't know if it was a rip in the fin or a simi-true double tail, I might buy her Monday and keep her and see what she grows into--the females are only .99 each.