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Earth Is Blue

Our planet is an ocean planet: Earth is Blue. The National Marine Sanctuary System protects some of the most iconic underwater places throughout the United States, but we can't do it without you. No matter where you are, the ocean and Great Lakes are in your hands. We hope the images of Earth Is Blue inspire you to help care for our ocean and to spread the word that Earth isn't green – it's blue.

Osprey sitting on a shipwreck
A kayaker paddling among shipwrecks
Several students gather around an instructor and a fishtank.

Volunteers Make a Difference

All national marine sanctuaries rely on the energy and passion of volunteers. Force Blue is a volunteer organization that unites two worlds by helping veterans and helping the environment. A team from Force Blue volunteered to conduct an initial survey of the subaquatic vegetation in Mallows Bay – Potomac River National Marine Sanctuary. The data that they collected provides much needed information on the various species and the health of the sanctuary.
map showing alternative b boundry


Resources present: Includes 118 WWI-era U.S. Emergency Fleet Corporation steamships; Maryland Indian Tribes heritage sites; remains of historical fisheries operations such as sturgeon and caviar industries; and Revolutionary and Civil War battlescapes.

Boundaries: Boundaries coincide with the Mallows Bay Widewater Historical and Archeological National Register District

Approximate total area: 18 square miles