Flabellum pavoninum

Flabellum pavoninum is a species of deep sea coral belonging to the family Flabellidae. It is found in the western Indo-Pacific Ocean at depths varying from 73 to 665 m. They are sometimes known as dentures of the sea because of the perceived resemblance of the corallum (skeleton) to a set of dentures.

Biology
Flabellum pavoninum is an azooxanthellate species of coral; this means that its tissues do not contain photosynthetic algae and it gains its nutrition solely from what it can catch with its tentacles from the surrounding water.