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The ultra-black Pacific blackdragon forms a circular shape with its body.
Article

Scientists Find First Ultra-Black Color in Deep-Sea Fishes

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

Bioluminescence

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a siphonophore
Video

Encounters with Bioluminescent Creatures

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Screenshot of "Sea Creatures from the Deep" video showing the teeth of an anglerfish.
Video

Sea Creatures from the Deep: A Video by National Geographic and the Census of Marine Life

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

An adult female anglerfish from the Linophryne family

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A close up profile of an adult anglerfish female from the Linophryne family collected in the northern region of the Gulf of Mexico. © 2016 DEEPEND/ Dante Fenolio
Photo

A profile of an adult female anglerfish from the Linophryne family

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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 
Photo

A female anglerfish larva from the Linophrynidae family

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Tropical hatchetfish, like the one shown in this X-ray photograph, live in the dark depths of the ocean. Like many other deep-sea fishes, they have large eyes and bioluminescent spots on their bellies.
Photo

X-Ray Image of a Tropical Hatchetfish

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Imagine eating an entire fish bigger than you—bones and all! At only 25 cm long, the black swallower often eats fish much larger than itself with the help of an expanding stomach. Sometimes the meal is so large that there isn’t enough time for digestio
Photo

Black Swallower

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Jaw of the goblin shark
Photo

The Goblin Shark

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A deep sea anglerfish called a dreamer
Photo

Deep Sea Dreamers

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