Looks like a harlequin to me, maybe even an extreme harlequin, although I wouldn't say for sure. It's really difficult to determine sex with a juvenile. He/she could be a late bloomer and develop a bulge later on, or it can stay that way and you know you've got a little girl. Depending on the age of this little one I mighty say you've got a girl on your hands. But it's a crap shoot if you ask me.