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Adult green sea turtles spend most of their time grazing in seagrass meadows.
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Green Turtle in Seagrass

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Seagrasses are flowering plants that can form dense underwater meadows and are an important shallow water habitat.
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Seagrass Meadows as Food

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Where the pH is the lowest, corals can no longer grow - sand, rubble and seagrasses replace the reef.
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Lonely Seagrass in Acidic Waters

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A sunset over Boston Harbor.
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Signs of a Recovering Harbor

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The vicious "killer shrimp."
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Rough Reputation: Are Invasive Species All Bad?

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A spiraled diatom with spines.
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A Diatom Helix

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Mangrove Salt Glands
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How Mangroves Deal with Saltwater

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

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

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An algal bloom, also known as a red tide, has converted the ocean's surf to a red color
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Red Tide

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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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The Amazon River carries all the rainwater that lands in the Amazon rainforest, covering some 2.1 million square miles, into the ocean. And with it, it carries vital nutrients like phosphorus, nitrogen and silicon.
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Where the Amazon Meets the Ocean

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