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A photo of a squid using bioluminescence to hide in the deep sea.
Overview

Bioluminescence

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Small red hyperiid.
Slideshow

The Hyper Eyes of Hyperiids: How Some Shrimp-Like Creatures See Light in the Deep Sea

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A deep sea crab (Rochinia crassa) poses with sea fan (Callogorgia spp.) and coral (Lophelia pertusa) on large carbonate boulder.
Slideshow

Oil Invades Coral Communities of the Deep

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A decomposing sea star loses its grip on a rock.
Article

Sickly Starfish: A Q&A with Dr. Chris Mah

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A sea monster attacks a ship in an illustration for 20,000 Leagues Under the Sea by Jules Verne.
Photo

Sea Monster Attack

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A sea slug with a rose shell
Photo

Rose Bubble Shell

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A blue and yellow slug
Photo

Lightning Bright Slug

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Two octopuses sitting underwater highlight the different textures the animals can take on.
Photo

A Pair of Octopuses

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Two nurse sharks hover over a baited cage
Lesson Plan

Head to Foot

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The elusive giant squid
Article

Reflections on the Successful Search for the Giant Squid

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Syllid fireworms can be found mainly on the seafloor, but they switch to a planktonic form to reproduce, where the females use bioluminescent signals.
Photo

Syllid Fireworms

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A photo of a sea walnut, a ctenophore.
Photo

Sea Walnut (Mnemiopsis leidyi)

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