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Great hammerhead in Bimini, Bahamas.
Overview

Sharks

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Chrysaora melanaster is a jellyfish found in the Arctic.
Overview

Jellyfish and Comb Jellies

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A rendering of an underwater marine scene from the Cambrian Period, featuring an arthropod, annelids, and other animals.
Slideshow

A Collection of Cambrian Fossils

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Two sea lions interact amongst schools of small fish.
Slideshow

Seal and Sea Lion Pictures

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Photograph of the underside of a gelatinous octopus with a bright yellow bioluminescent ring around her mouth.
Slideshow

Bioluminescent Animals Photo Gallery

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An oil drilling platform in oil-free water two years after the Deepwater Horizon oil spill in the Gulf of Mexico.
Overview

Gulf Oil Spill

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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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two mangrove trees in the crashing waves
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Mangroves

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a close up of bacteria
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Marine Microbes

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A harp seal in icy water
Overview

Seals, Sea Lions, and Walruses

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