OK, A few weeks ago i added a small arowana maybe 3 inches in length to my 30 gallon. It contains a single killifish (cycler who seems to be holding his own lol) and 2 senegal bichirs each about 5 1/2 inches long. All seemed to be well until a christmas eave party came and i was 8 hours or so late on feeding for the first time in a couple months....i come home and my bichirs and arowana are going crazy. when i noticed i was already dropping in pellets for food and the bichirs smelled it and peeled off immediately but then i noticed my arowana is missing his caudal fin and his anal fin is missing a few little pieces. the worst thing is that he is missing the very back 1/8 in of his operculum. i immediately moved the bichirs into my empty 99% done cycling 55 gallon. While the arowana is obviously wounded he still seems lively and still has a voracious appetite so i was wondering if he would be able to fully heal if anyone knew? Or any advice to help it along?