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This queen parrotfish scrapes algae from Caribbean reefs with its parrot-like beak.
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Queen Parrotfish

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A bright-green sea slug with a black background.
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Sea Slugs: One Species at a Time

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Broad-leaf seagrass (Posidonia australis) with algae epiphytes grows at Corner Inlet Marine National Park in Australia.
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Seagrass with Epiphytes

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An underwater blizzard of oil, marine microbes, "sea snot", and algae.
Article

Five Questions with Uta Passow, How An Oil Spill Affects the Movement of Carbon In the Ocean

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Fish swimming in waters of Bay Islands, Honduras
Article

Improving Grades for the Mesoamerican Reef

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Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
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Coral Reef on Gangga Island, Indonesia

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Cartoon t-shirts with got plankton.
Article

The Cloud Factories that Live in the Sea

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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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In this photo of a shallow coral reef in the Pacific there are three species of forams. Their colors come from the symbiotic algae that live inside the foram shells.
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Shallow Coral Reef Foraminifers

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Kelps are large, brown algae that grow along coasts around the world, especially in cooler regions.
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Kelp Pennant

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a frond of kelp underwater
Overview

Kelp and Kelp Forests

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