That's what I said. It's MY fault. I put him in there with aggressive cichlids thinking he could hold his own. I now realize how aggressive these fish can be. I don't blame the lab, but it is upsetting. I feel better now knowing that he has a good chance of the fins coming back with proper care. I still believe it was mostly the lab though. Although the jack is bigger, the lab seems to run the tank for now. Regardless, its my fault not his for thinking I could keep these much different fish in the same tank.