There's a new article up on the Biology site -
Coral - Anatomy and Feeding Behavior "Coral colonies are composed of many tiny, cup-shaped animals called polyps.Polyps, which are related to jellyfish, can be as large as a saucer or smaller than the head of a pin. Millions of polyps working together eventually form the framework of coral reefs."
After you've read the article, come on back here to discuss it!