The hard parts or skeleton of various Anthozoa, and of a few Hydrozoa. Similar structures are also formed by some Bryozoa.

The ovaries of a cooked lobster; -- so called from their color.

A small, soft-bodied animal that secretes a hard exterior skeleton. Corals can be found individually (solitary) or in huge colonies that form coral reefs. Corals thrive in warm, shallow seas. One species of coral looks like the horn of a cow. Another species looks like a human brain. Their common names are derived from these images.

A bottom-dwelling marine invertebrate organism of the class Anthozoa.