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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

 Coral reefs are the most diverse of all marine ecosystems. They teem with life,...
Japanese scientists videotaped this female giant squid, alive, at the water's surface
overview

Giant Squid

 Giant squid live up to their name: the largest giant squid ever recorded by...
On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
overview

Sea Level Rise

 The ocean never stops moving. When you visit the beach, waves roll in and recede...
A shell placed in seawater with increased acidity slowly dissolves over 45 days.
overview

Ocean Acidification

 Ocean acidification is sometimes called “climate change’s equally evil twin,”...
A live coral polyp with turquoise tissue and brown tentacles closes its mouth (the slit at the center of the radiating ribs) tight.
Photo

Closed-Mouth Coral

 A live coral polyp with turquoise tissue and brown tentacles closes its mouth (the...
Beating Cilia of Comb Jelly Combs
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Sea Gooseberry Larva

 These beautiful wisps are the hair-like cilia of a sea gooseberry larva, a common...
Corallimorpharian
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Soft Coral Close-Up

 These neon balloons weren't blown up for a party: they are the colorful tentacles...
The mauve stinger is a glowing jellyfish.
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Glowing Mauve

 The mauve stinger’s (Pelagia noctiluca) name in German means “night light,”...