So two of my guppies have what looks like a bettas twin tail. Is this just unique or is it a certain variation? I found them at my petsmart who are pretty good with their animals from what I can tell. And the tail isn't really split, it's like clear between the two "tails". Edit: ok, I feel kind of silly asking about this now I don't really think they're a different kind of guppy... Just different tail variations. What do you guys think?