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A blue shark, with a copepod attached to its dorsal fin, coasts through waters near New England.
Photo

Blue Shark

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Two bright orange anemonefish poke their heads between anemone tentacles.
Photo

Clownfish in their Host Anemone

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A tusk shell hermit crab peeks out of his shell.
Photo

Tusk Shell Hermit Crab

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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
Article

Long Before Coral, Mollusks Built the Ocean's Reefs

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A tusk shell hermit crab peeks out of his shell.
Article

Uncovering Biodiversity Before It Disappears

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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

Celebrating Marine Moms

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A sea toad from the deep waters off of Curacao.
Slideshow

Collections from Curaçao

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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
Overview

Ocean Acidification

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