Attacked !

[trilinearmipmap]

Supportive treatment ie.

Give the butterfly the best tank conditions possible to allow it to recuperate.

This might mean quarantining it in a cage inside the tank made up of eggcrate if any other fish are bothering it.

Then I would offer it small frozen food such as small or chopped mysis.

I would see if the Copperband starts to eat in a few days if it is given some solitude and no fish to compete with it for food.

Most likely it can live off its stored energy reserves for a week or two, if this gives it enough time for the mouth to heal then hopefully it may do OK.

I would not medicate at all or do any kind of dip, IMO this would just cause more stress for him.

Anyway that is what I would do.

And saute the crab with green pepper and black bean sauce.