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Depending on whom you talk to, jellyfish are either fascinating, a nuisance, a toxic menace, or some combination of the above. Jellyfish plop into the media spotlight when their presence causes beach closures, or...
The ocean is home to a phenomenal diversity of marine organisms. They have...
What reef animal comes in a rainbow of crazy colors, can throw out its stomach...
This summer, many of you have likely enjoyed feasting on crabs, be they blue,...

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This pair of sea butterflies ( Limacina helicina ) flutter not far from the ocean's surface in the Arctic. Sea butterflies are a type of sea snail, but instead of dragging themselves around the seafloor with a muscular foot, they...
The sea hare gets its common name from its equivalent of nose and tongue—...
“Upon returning from the reef after a night dive, I swam toward a bright...

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Giant squid live up to their name: the largest giant squid ever recorded by scientists was almost 43 feet (13 meters) long,...

The Ocean Blog

An adult giant squid struggles for survival in an encounter with a sperm whale - its only known predator. The whale will probably overpower and eat the squid. More about the giant squid can be found...
Simon Coppard, a post-doctoral research fellow at the Smithsonian Tropical Research Institute in Panama and an Encyclopedia of Life Rubenstein Fellow specializing in echinoids often uncovers new...
Watch as barnacles feed on bioluminescent dinoflagellates. Barnacles are crustaceans (like crabs, shrimps and lobsters) that secrete their shells for protection while living attached to things like...
Smithsonian Marine Science Network Postdoctoral Fellow, Seabird McKeon, returns from the Smithsonian field site in Belize. Together with Dan Barshis of Stanford University, Seabird reports on the...
This nudibranch, or shell-less marine snail, is making a comeback to a location it hasn't been to in years along the California coast. First discovered off the coast of Southern California in 1902,...
This new species of lobster is blind—an adaptation to deep-sea life —and has very bizarre claws, or chelipeds. It was discovered about 300 meters (984 feet) deep in the Philippine Sea by a Census of...
The ROV Hyper Dolphin caught this deep-sea jelly (Atolla wyvillei) on film east of Izu-Oshina Island, Japan. When attacked, it uses bioluminescence to "scream" for help—an amazing light show known as...
Another common species of sargassum shrimp, Leander tenuicornis (Palaemonidae), can be spotted by its long transparent claws or "chelae". Very similar shrimp are found in near shore habitats all...
Dryodora glandiformis is a ctenophore found in Arctic and Northern European waters, bearing a pair of long and lovely tentacles.
This copepod Calanus hyperboreus (up to 7mm in length) lives in the Arctic , usually within 500 meters of the surface. To survive the cold Arctic winters, Calanus hyperboreus builds up dense fat (...
This newly-discovered carnivorous sponge ( Chondrocladia lyra ) was found using robotic submersibles operated by the Monterey Bay Aquarium Research Institute 10,000 feet below the surface in dark...
The Endangered Species Act (ESA) was signed into law on December 28, 1973 by President Nixon. Over 2,000 species are currently on the ESA, and they are separated into "Threatened" and "Endangered"...
The spiral-tufted bryozoan ( Bugula neritina ) is being studied for a potential Alzheimer's disease and cancer drug -- but it's not the bryozoan that makes the chemical. The chemical, found in the...
This is a tree topper unlike any other! Reminiscent of a freshly made snow angel, these pteropods are actually shell-less sea snails ( Clione limacina ). Unlike the typical snail, they flap their...
Travel to a world of perpetual night--the deep ocean hydrothermal vents near the Galapagos Rift where life thrives around superheated water spewing from deep inside the Earth. Discovered only in 1977...
“Upon returning from the reef after a night dive, I swam toward a bright reflection and came eye-to-eye with this beautiful, curious squid," said Charles Viggers, a Nature's Best photographer. Squids...
These candy cane snapping shrimp ( Alpheus randalli ) have a pretty nice set up. They share their living space with goby fish, helping the fish dig and maintain the burrow that they share in the...
One of the most common inhabitants of the sargassum community, the shrimp Latreutes fucorum (Hippolytidae) is perfectly colored to hide on the leaf-like blades. Off the coast of Belize, Smithsonian...
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