Coral Beauty

[GinKu]

i just got this guy yesturday i'd put him in the tank and left the lights off till tomorrow, well he's really shy and likes to hide behide the rocks. i was looking at him and i notice on one side close to his gill there is like a scar or something it look like he ram in to a rock last night and cut him self how do i cure it him.. i don't want him to have an infection or some sort
and he's not eating and i think it'll take awhile for him to eat after a couple or days is this right?

oh ya can i put a keyhole angel in the same tank? i'm guessing it's not safe right?