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A nudibranch showing a closeup of their fleshy, tentacle-like growths, called cerata.
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Aeolid Nudibranch Defense

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Squid size comparison chart: Lycoteuthis springeri (10-12cm), Leachia atlantica (up to 12cm), Promachoteuthis sp. (up to 5cm), Batoteuthis scolops (up to 20cm).
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What is the Largest Squid? A Squid Size Comparison Chart

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This Marine National Monument protects a chain of atolls and reefs 1,931-kilometers (1,200-miles) long.
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Northwestern Hawaiian Islands Marine National Monument

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Photograph of a many-armed sea star with maroon and white feathery-looking arms, with a deep red sea fan in the background.
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Feather Star

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Where the pH is the lowest, corals can no longer grow - sand, rubble and seagrasses replace the reef.
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Lonely Seagrass in Acidic Waters

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Like other cephalopods, the common cuttlefish (Sepia officials Linnaeus, 1758) possesses serious brain power.
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Common cuttlefish

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The staghorn coral is listed as Threatened under the U.S. Endangered Species Act. It is one of 22 coral species listed.
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Staghorn Coral

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Juvenile Clam with Tentacles
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Spaceship Mollusk

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Off the coast of North Carolina, Nizinski and Johnson Sea Link pilot Phil Santos descend through the water column towards the target site.
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Submersible and Deep-Sea Corals

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Students studying climate change pose for a photo against a wall.
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National Aquarium Delegation

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Oil burns during a controlled fire May 6, 2010 in the Gulf of Mexico.
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Deepwater Horizon Oil Spill Burn

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The grasses and animals living in marshes help to filter water and stabilize shorelines, along with providing habitat for a variety of mammals, fish, shellfish and amphibians and a haven for migratory waterfowl.
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Wetlands to the Horizon

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