Hey all - I brought home two new guppies yesterday afternoon and this evening one of them (Who we were calling Blue-Barry) has had his tail completely shredded... there is no fin there at all, just spindly rays. His left fin also looks like its split. I didn't really pay much attention to them this afternoon, but saw him swimming around okay at other levels of the tank. Now he has no way to get down from the surface. What happened? Is there something I can do to help him? Really worried he won't make it very long at all Has this happened to your guppies or other fish before? Our other guppies have never done this to each other, leading me to believe it is the other new guy we brought home who is being an aggressor. First 2 photos are of when we brought him home yesterday afternoon, with his beautiful blue tail intact. Middle 2 photos are of right now, with no tail Last 2 are of the other new guy (Zip), with Blue-Barry. He's super cool-looking, but maybe a super evil jerk?