Coral

If you look carefully, there are MANY different types of coral.

Whip coral

A single baby thingy of Faulkner's Coral

More sea fans

I call this the apple-wrapper, but its scientific name is Triphyllozoon.  It's a bryozoan (one of the most ancient groups of fossil animals). The close-up picture on the right shows the feeding filters inside the bryozoan (they filter the water going through the lattices).
 

Coral

Algae

Free-living coral

Soft coral

Neptune's Cup (I love the name)

Soft Coral

Mushroom Coral

Secret Coral