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Deep Sea | Smithsonian Ocean

A translucent and red jellyfish floating in dark blue, deep ocean water.

Deep Sea

Preview

Octocorals dominated the seafloor on Chris Mah's Okeanos mission to Johnston Atoll in the remote Pacific Ocean.

Deep-sea Corals Overview

Did you know that corals not only grow in coastal reefs but in the deep ocean as well? This overview dives into everything to know about deep-sea corals.

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Featured Content

A variety of corals cling to Manning Seamount, just off the coast of Cape Cod, Massachusetts.

Seamounts, A Deep-Sea Habitat

a deep sea jellyfish

The Deep Sea

red worms penetrate holes in bone

Zombie Worms Crave Bone

Meet the Tiny Bacteria That Give Anglerfishes Their Spooky Glow

A deep sea anglerfish called a dreamer

The Gulf of Mexico: A Deep-Sea Treasure Trove of Fishes

Are You An Educator?

At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans.

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Deep Sea Articles

Colorful corals and brittlestars on Manning Seamount off the New England coast.

Seamounts: Underwater Oases

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

From Submarines to Robots: Exploring the Deep Ocean

Dr. Robert Ballard with an ROV

Five Questions for Robert Ballard

A red deep-sea fish specimen.

The Whalefish Mystery

Woods Hole researchers sample oil from the ruptured well in the Gulf of Mexico

Scientists From Woods Hole Respond to Gulf Oil Spill

J. Murray Roberts studies and maps the cold-water corals known as Lophelia in the North Atlantic.

Exploring the Blue Planet with J. Murray Roberts

Black coral, primnoid coral, and feather stars flourish deep on the pristine Davidson Seamount.

Amy Baco-Taylor: Passionate about Deep-Sea Corals

Dr. Brendan Roark discusses different methods of sampling deep-sea corals with undergraduate students at Texas A&M University.

Coral Scientist Brendan Roark: On an Urgent Mission

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.

Martha Nizinski: Hooked on Deep-Sea Corals

Auster gets ready to study fish predators at Gray’s Reef National Marine Sanctuary off the coast of Georgia.

Peter Auster: The Gee Whiz Factor

A photo of a 2011 installation by artist Shih Chieh Huang, featuring his illuminated creations made from everyday objects.

When Art Meets Science: Exhibition Inspired by Bioluminescence

Many medicines were based on a chemical from the sea sponge Tectitethya crypta.

Five Questions for Shirley Pomponi, Medical Sponge Hunter

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