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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
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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.
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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.
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Ocean Acidification

 Ocean acidification is sometimes called “climate change’s equally evil twin,”...