Jellyfish

Three Cassiopea, or upside-down jellyfish, seen from above in a lab at the Smithsonian’s National Museum of Natural History. The cloudy matter floating above and to the left of the jellyfish is a mucus that they exude.

These Jellyfish Don't Need Tentacles to Deliver a Toxic Sting

Smithsonian scientists discovered that tiny 'mucus grenades' are responsible for a mysterious phenomenon known as 'stinging water'

A two-month-old filefish collected in the survey surrounded by plastic bits.

Newly Identified Fish Nurseries Are Choked With Plastic

Larval fish congregate in surface slicks, which contain plankton—and 126 times more plastic than surrounding waters

These Newly Discovered Shrimp Call a Whale Shark's Mouth Home

Found in a whale shark off Okinawa, hundred of amphipods were living it up in the giant fish's gills

The two divers spent an hour or so swimming alongside the giant barrel jellyfish.

Divers Encounter a Human-Size Jellyfish Off the Coast of England

Barrel jellyfish typically grow to a length of up to 3 feet, but this one measured closer to 5 feet long

In Asia, many jellyfish species find their way into cuisine. The largely tasteless animals are used predominately for their texture.

To Make Jellyfish More Appetizing, Add Light and Sound Effects to the Dining Experience

Gastrophysicists are going to great lengths to convince Westerners to indulge in the tasteless sustainable seafood

The experience unfolds across five rooms: the Recycle Bank, the Coral Tunnel, the Net Guard, the Jellyfish Station and the Bubble Mall.

A New Pop-Up Exhibit in NYC Immerses Visitors in a Deep-Sea Experience

Designer Randy Fernando says the show strives to be "interactive and playful," while also "incorporating touches of activism"

Your Oldest Ancestor Was Probably Sponge Like

A new study may settle a long-running debate about which creature was the first to evolve from a universal common animal ancestor

Surprising Footage Captures Arctic Jellyfish Lurking Under the Ice

The creatures were previously thought not tough enough to survive the harsh winters

Cassiopea jellyfish resting "upside-down" in their tank

Even Without a Brain, Jellyfish Still Need to Sleep

These simple, ancient creatures show just how deeply rooted sleep may be in the animal kingdom

The tentacles of the Portuguese man o' war, (which is technically a siphonophore, a group related to jellyfish), contain harpoon-like cells called nematocysts that deliver painful doses of venom.

Forget What You've Heard About the Pee Cure, Here's How to Really Fix a Jellyfish Sting

Scientists studied what to do and what not to do when stung by a jellyfish. The result? Folk remedies are bad.

Are creatures like this at the bottom of animals' family tree?

Scientists Think Comb Jellies May Have Come Before All Other Animals

Sorry, sponges—there’s a new oldest ancestor in town

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Scotland’s Newest Nature Trails Are Underwater

The Scottish Wildlife Trust is putting snorkelers up close with the country’s marine wildlife

Deep-Sea Researchers Spot a Mysterious Jellyfish Near The Mariana Trench

The glowing jellyfish was previously unknown to science

Jellyfish Lake, Palau

Watch One Snorkeler Swim Through a Lake of Pulsating Jellyfish

Jellyfish Lake is a popular tourist destination

A pelican dives for dinner among an unsuspecting school of fish.

Paper Turtles and Frisky Skates Bring This Indoor Seashore to Life

A new exhibit at the National Aquarium in Baltimore takes visitors on a trip to the beach and into the dark depths of the Atlantic

Moon jellies (Aurelia aurita) drift in dark waters at the Sunshine International Aquarium in Tokyo.

Big Moon Jelly Blooms Tied to New Dock Construction

A floating pier installed off Japan led to a four-fold increase in baby jellies, offering a solid link between structures and blooms

Introducing Dendrogramma, a deep sea creature that resembles a mushroom but has more affinity to a jellyfish.

Deep-Sea Mushroom Creatures Found Off Australia

Neither fungi nor fish, these oddball organisms collected in 1986 may represent an early branch on the tree of life

A similar species of Irukandji jellyfish, but with the tentacles (and a fishy lunch inside).

A New, Potentially Deadly Species of Jellyfish Was Discovered Floating Around Australia

The new species' sting can cause Irukandji syndrome, which sometimes leads to stroke and heart failure

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Extreme Jellyfish

There are some 2,000 species of jellyfish. Some are tasty, others will kill you with the tap of a tentacle. Here are nine varieties that really stand out

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