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Map showing the range of the eastern and western populations of Atlantic bluefin tuna and their spawning grounds in the Gulf of Mexico and the Mediterranean Sea.
Article

Atlantic Bluefin Tuna (Thunnus thynnus)

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
Overview

Sea Level Rise

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A black and white diagram of a tunicate larvae.
Photo

Tunicate Larvae

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a pile of pink walruses
Photo

Walrus Haulout

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Thalassinidean shrimp (Thalassinidea) build complex burrows deep in the mud.
Photo

Thalassinidean Shrimp

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Video

Gulfcast - A Treadmill for Mahi-Mahi

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Photograph of a bristly brown and white worm, with one end pressed against a pale green coral.
Photo

Fireworm Takes on Fire Coral

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Monk seal pup
Photo

A Mediterranean Monk Seal Pup

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A variety of corals pictured underwater.
Article

New Research in Coral Shines a Light on the Evolution of Bioluminescence

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Photo of a Hawaiian monk seal on the beach, with the ocean in the background.
Photo

The Endangered Hawaiian Monk Seal

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The rich colors of emperor angelfish make them a vibrant version of royalty.
Photo

Emperor Angelfish

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Two nurse sharks hover over a baited cage
Lesson Plan

Jelly Critters: Gelatinous zooplankton

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