Young male VTs often will have the spade tail look, but it's not a spade tail, it's actually a male VT who is a late bloomer - the dorsal, ventrals, anal fins are way too long for a VT girl, the body is elongated rather than stubby. I'm 99% sure it's a young male.. don't go by the ovi, as males will have that as well while young. Most likely this one is more laid back and has been hiding in the tank with the girls, which would cause his fins not to grow fully out, and him to have his ovi still. Most young males if kept in the tank with females for an extended time will be "late bloomers".
But that shape is a young male VT's shape of the tail before they grow out. Keep in mind, normally (not power grown like most of the bettas breeders do) it takes easily 9 months for the fish to mature and grow out.
Also keep in mind, if it is a VT girl, you just lost your chances of having HMs like in your avatar.. you'll end up with VTs, possibly a few deltas, but not sure on that.
Last edited by Myates; 03-29-2013 at 07:17 PM.