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Dr. Stephen Cairns, a Smithsonian research zoologist, studies deep-water corals.
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Dr. Stephen Cairns

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A net used to trawl the ocean floor scooped up this large specimen of deep-sea coral.
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Coral Trapped in Trawler Net

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In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.
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Coral Goby Cleans Coral

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The weedy sea dragon male can hold around 250 eggs in his pouch.
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The Dragon of the Sea

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It's a pygmy seahorse (Hippocampus bargibanti), found in Indonesia's biodiverse Coral Triangle and one of the smallest seahorse species in the world! They can change colors like a chameleon to blend into their environment. This helps to protect them from p
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Can You Spot the Seahorse?

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A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs.
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A Tale of Sex and Stress in the Ocean

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The Line Islands are one of the most remote places in the Pacific Ocean.
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Expedition to the Line Islands

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This colony of Lophelia pertusa was photographed from the Mingulay Reef Complex off Scotland in 2005.
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Lophelia pertusa Colony

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This photograph of Gerardia sp. was taken at the Cross Seamount in the Pacific Ocean at a depth of 400 m (1,312 feet).
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Gold Coral Close-up

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This bubblegum coral has a fanlike shape. It is growing 1,310 m (4,298 ft) deep on the Davidson Seamount.
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Bubblegum Coral

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Orange and red deep-sea corals.
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Aleutian Coral Reef

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After ocean scientists sort deep-sea coral samples into their different types, they measure and photograph the specimens.
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Studying Deep-Sea Corals

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