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Horizontal bands of color represent different species of lichen that have adapted to the conditions at different heights above sea level.
Article

Seaside Lichens

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Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
Overview

Corals and Coral Reefs

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The siphonophores are an order of marine animals in the phylum Cnidaria (the same phylum containing jellyfish). 
Slideshow

Prints from Ernst Haeckel

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Japanese scientists videotaped this female giant squid, alive, at the water's surface
Overview

Giant Squid

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Two octopuses sitting underwater highlight the different textures the animals can take on.
Overview

Octopuses and Squids

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a man with a hard helmet in a cave
Article

Adaptation in the Extremes: What Scale Worms Teach Us About Evolution

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A Cirraturlid worm swims in the open ocean.
Article

Why I Love Polychaetes

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A polar bear and its cub in Arctic National Wildlife Refuge, Alaska.
Slideshow

Celebrating Marine Moms

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Chrysaora melanaster is a jellyfish found in the Arctic.
Overview

Jellyfish and Comb Jellies

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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
Slideshow

Zooxanthellae and Coral Bleaching

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Relatively slow moving, juvenile plane-head filefish Monacanthus hispidus (Monacanthidae) travel along with the algae. They pick off and eat small animals as they move around in the rotating sargassum ball. Adult filefish only grow to be about 11
Article

A World Adrift: Life in the Sargassum

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Horseshoe Crab in Stage Harbor, Massachusetts
Article

This Flu Season, Thank a Horseshoe Crab

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