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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
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Shallow and Deep-Sea Coral Reefs

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Stephanocyathus (A.) spiniger, a solitary, deep-water stony coral species, has six long spines that slow it from sinking into soft substrates.
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Solitary Deep-water Corals

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The Hawaii Undersea Research Laboratory’s Pisces V submersible is lowered for a dive to study deep-sea corals.
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Submersible Launch

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An illustration of a deep-sea dragonfish.
Photo

Deep-Sea Dragonfish

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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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Two nurse sharks hover over a baited cage
Lesson Plan

The Adventures of Zack and Molly Learning Guide

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Alvin, a human occupied vehicle (HOV), returns to the ship after a dive.
Article

From Submarines to Robots: Exploring the Deep Ocean

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Japanese scientists videotaped this female giant squid, alive, at the water's surface
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Giant Squid

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A female anglerfish larva from the Linophrynidae family collected in the northern region of the Gulf of Mexico. © 2016 DEEPEND/ Dante Fenolio 
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A female anglerfish larva from the Linophrynidae family

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Big Red Deep Sea Jellyfish
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Big Red Jellyfish

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Scientist Martha Nizinski examines a sample of the deep-sea coral Lophelia pertusa, collected 600-m (1,969-ft) deep off the coast of the southeastern United States.
Photo

Deep-Sea Coral Sample

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A photo of a sea toad specimen.
Article

A Sub and a Sea Toad

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