i have a 6" fish my g/f gave me in my 55g and i do nt even know what kind of fish it is , it has orange fins with scales and big eyes and is long. but he ate 6 of my fish in 2 nighs, 3 fish in front of me. I NEED TO GET RID OF HIM and i cant return him to my fish stores b/c they dont carry this fish and wont accept it (ive tried with other fish and they wont accept it). i cant run another tank because i have 2 tanks running already and i have nobody to give it to!! i dont wanna kill it because i would feel really bad but id be really angry if he nipped the fish that i had for a while!