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Seagrasses are flowering plants that can form dense underwater meadows and are an important shallow water habitat.
Overview

Seagrass and Seagrass Beds

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A coral head in the Mesoamerican Reef has both bleached and living coral. The white sections are bleached and the brown parts still contain zooxanthellae, the symbiotic algae that provide food to their coral hosts.
Article

Coral Under Pressure: Monitoring Bleaching In Real Time

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An underwater blizzard of oil, marine microbes, "sea snot", and algae.
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A Dirty Blizzard In the Gulf of Mexico

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The Ha Long Bay site in Vietnam was inscribed on the World Heritage List in 1994. The site's 1,600 islands and islets form a spectacular seascape of limestone pillars surrounded by species-rich waters, including a tremendous diversity of marine algae and o
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Ha Long Bay, Vietnam

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Hundreds to thousands of tiny crustaceans live on each right whale, eating algae that settles on their skin.
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Whale Lice

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Sea Turtle
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Green Sea Turtle

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Amanda Feuerstein with a nesting olive ridley (Lepidochelys olivacea). Feuerstein is a co-author of a study that surveyed algae, crustaceans, mollusks, and other epibionts that live on the turtles in the Pacific Ocean.
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Searching for Life -- Epibionts -- On Sea Turtles

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Walter Adey and the NMNH coral reef tank
Article

The Evolution of a Reef Aquarium

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Valentinni's sharpnose puffer lives on Indo-Pacific coral reefs, where it shoals in groups of 10-100 puffers and feeds on algae and tunicates.
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Valentinni's Sharpnose Puffer

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Dinoflagellates are major producers of oxygen in the ocean (and freshwater). But some species can grow out of control, causing a red tide.
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Dinoflagellate

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