Coral

Coral reef in Hawaii (NOAA)
Scientific classification
Kingdom Information
Domain |  Eukaryota
Kingdom |  Animalia
Subkingdom |  Radiata
Phylum Information
Phylum |  Cnidaria
Class Information
Class |  Anthozoa
Population statistics

Coral is a rocklike deposit consisting of the calcareous skeletons secreted by various anthozoans. Coral deposits often accumulate to form reefs or islands in warm seas.[1]

1. ↑ http://education.yahoo.com/reference/dictionary/entry/coral