Red Sea Fan (7”-10”) Nautilus The Rugosa are an extinct

The Rugosa are an extinct group of corals that were abundant in Middle Ordovician to Late Permian seas

Elkhorn coral is an important reef-building coral in the Caribbean

is also often known as the Red Helmet Seashell

and the exterior is sculpted with wide ridges that spiral down the whorls

consisting of starfish (including the infamous crown-of-thorns starfish) and other molluscs

Red Sea Fan (7”-10”) Nautilus The Rugosa are an extinctThe Red Sea Fan comes from the deep parts of the reefs of the Indian Ocean and has a classic sea fan appearance. It is red in color and the thin branches are woven creating a mesh like appearance. The branches have many very small white polyps that are usually only seen at night when the lights of the aquarium are off. The base of this gorgonian is brown in color, and is usually attached to a small piece of rock.