[MechEng99]

Symon - I would definitely let the supplier know what condition you received that coral in. Like psirex said, it looks like the mouth is completely gone...which means there's nothing you can do other than leave it, let it die, and hope it makes anthocauli (babies off the skeleton). Whenever coral mouths are gaping and not reacting to any stimulus, you shouldn't feed them. It means they are stressed to an extreme point (or nearly dead). The food can't be digested, so it'll rot...causing nearby tissue to rot.

Sorry...maybe a better picture will show differently.