Help ID this critter on coral

[Saaack]

Has anyone seen this before. I assume it's not part of the coral which is why I've posted this here. It only appears at night. I took this pic about an hour after dark. Does not seem to be causing and damage to coral (Sarcophyton).

Thanks, Tom

 

[capncapo]

It appears to be a Comb Jelly. A harmless Ctenophore.

 

[LeslieH]

Ctenophores catch small crustaceans & other items with their tentacles. It certainly won't harm any corals.

 

[Saaack]

Thanks for your replies.

Tom