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This is the first photograph of a live giant squid (Architeuthis) in its natural habitat.
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Giant Squid on Baited Camera

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Mangrove roots provide an underwater habitat for many marine species.
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Mangrove Roots Above Water

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A Coral Reef Watch satellite monitors the temperature of the world’s oceans.
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Coral Reef Watch Satellite

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The sun sets over the Smithsonian’s marine field station at Carrie Bow Cay, Belize. For more than three decades, it has been home to the Smithsonian’s Caribbean Coral Reef Ecosystem Program.
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Sunset at Carrie Bow Cay

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On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
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The Island of Moorea

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A brown sea hare sits in shallow ocean water.
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Sea Hare in the Intertidal Zone

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Broad-leaf seagrass (Posidonia australis) with algae epiphytes grows at Corner Inlet Marine National Park in Australia.
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Seagrass with Epiphytes

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Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually.
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Jellyfish Lifecycle and Reproduction

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Comb jellies (such as this Bolinopsis species) are named for their combs: the rows of cilia lining their bodies that propel them through the ocean.
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Ctenophore Combs - Close Up

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A shining jingle shell on the sand.
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Jingle Shells

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Seahorses are the only fish species that can hold your hand! Unlike most fish that use their tails for swimming, seahorses, such as this big-belly seahorse (Hippocampus abdominalis), use their monkey-like tails to hold onto objects in their environment, li
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Seahorses Have Monkey-Like Tails

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Seahorses are hitchhikers. They can travel long distances across the ocean—farther than they can swim—by attaching themselves to floating seaweed and debris.
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Hitchhiking Seahorses

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