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A close-up image of Johnson's seagrass growing in sand.
Photo

Johnson's Seagrass

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Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas Island.
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Unhealthy Coral Reef, Kiritimi, Line Islands

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Macroscopic Algae (Ventricaria ventricosa)
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Bubble Algae (Ventricaria ventricosa)

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A bloom of algae from up above
Article

What Exactly Is a Red Tide?

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Kopelman Watercolor Detail
Article

Up Close and Personal with a Mangrove Root

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Harbor seal in a kelp forest near Cortes Bank, near San Diego California.
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Harbor Seal in a Kelp Forest

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Neptune grass (Posidonia oceanica) is a slow-growing and long-lived seagrass native to the Mediterranean.
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Fish Feeding in Seagrass

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In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.
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Coral Goby Cleans Coral

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The bright, brilliant swirls of blue and green seen from space are a phytoplankton bloom in the Barents Sea.
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Geoengineering Phytoplankton Blooms

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Pink crustose algae covers the surface of a rock.
Photo

Encrusting Pink Algae and a Seastar

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Sargassum forms dense clumps up to the size of a beach ball that slowly rotate as they drift.
Article

Too Much of a Good Thing—the Atlantic Sargassum Belt

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This shrimp is colored to fit in - probably why they are common members of the seaweed community.
Slideshow

A World Adrift: Life in the Sargassum Slideshow

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