Good news, despite his injuries frogfish seems fine
He's swimming around fairly normally, and he even ate (and kept down) 2 pieces of silversides
Also I have to say (even though it's stinking up my computer room something fierce, since that's where the tank is located) is: GO MELAFIX GO MELAFIX GO GO GO MELAFIX! Let your magic healing powers begin! It looks like his tail is already starting to heal and sort of looks like a bit of re-growth on it too. The red/pink kinda concerns me but I think that's just part of the healing process and I think it's normal.
I also think I saw the tail part, I tried to pick it up with the tongs (in order to take a closer look & remove it) but the frog thought I was trying to feed him and knocked the piece of ? (maybe tail part) from the tongs and then I couldn't find it again, it went under a rock I think.