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Octocorals dominated the seafloor on Chris Mah's Okeanos mission to Johnston Atoll in the remote Pacific Ocean.
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Deep-sea octocorals: An ecosystem of their own

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Boats docked in a Chesapeake Bay harbor
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Rapa Whelks: Invaders of the Chesapeake Bay

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The vicious "killer shrimp."
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Rough Reputation: Are Invasive Species All Bad?

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An arrow-worm from the genus Spadella. Alvariño discovered and classified the species Spadella gaetanoi in 1978.
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Ángeles Alvariño: Woman of Many Namesakes

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the interior of an oyster shell with a pearl
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How Oysters Create the Ocean’s Gems

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The shell of a sea slug
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A Microscopic Identity Crisis

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Students from Helen Scales' class visit the seashore to explore mollusks.
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Students At the Shore

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The Komodo National Park site in Indonesia was inscribed on the World Heritage List in 1991. The site hosts "Komodo dragons" (Varanus komodoensis), a unique species that exists nowhere else in the world and is of great interest to scientists studying evolu
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Tunicates—Not So Spineless Invertebrates

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Rudist clams are mollusks that went extinct about 65 million years ago.
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Rudist Clams

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Amanda Feuerstein with a nesting olive ridley (Lepidochelys olivacea). Feuerstein is a co-author of a study that surveyed algae, crustaceans, mollusks, and other epibionts that live on the turtles in the Pacific Ocean.
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Searching for Life -- Epibionts -- On Sea Turtles

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Like snails, clams, and even slugs, giant squids are all mollusks, with soft, fleshy bodies.
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Squid Relatives

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Pacific cephalopods illustrate the wide diversity among this group of mollusks.
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Squids and Cephalopod Diversity

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