Official websites use .gov
A
.gov
website belongs to an official government organization in the
United States.
Secure .gov websites use HTTPS
A
lock
() or
https://
means you’ve safely connected to the .gov website. Share
sensitive information only on official, secure websites.
Corals are marine invertebrates that include soft and hard corals. Coral reefs occur in clear, shallow waters throughout tropical regions. Reefs are formed from calcium carbonate skeletons, built by tiny coral animals that make up large coral colonies.
