injured

This is the dominant male yellow lab. Above his lip looks scarred, trying to figure out if I need to do anything or just assume it's from fighting.

We got a shipment of fish this AM that mostly look great, but one of the little oil cats arrived with a broken pectoral fin. He's unable to right himself and keeps listing to his side or goes belly up. Any advice for how to help him? We are acclimating them now... Too bad he's not a really...