Coralline algae at Rose Atoll, located off the coast of American Samoa. An atoll is an island of coral that encircles a lagoon partially or completely.
Thank you for visiting NOAA's National Ocean Service. Take our website user survey. We welcome your ideas, comments, concerns and suggestions.
NOAA's National Ocean Service
SSMC4, Room 13317
1305 East-West Hwy
Silver Spring, MD 20910
Nuisance flooding: a growing problem for coastal areas. Here's what you need to know.
Continue reading →
Revised: 2014-01-16 | You are here: http://oceanservice.noaa.gov