Jellyfish

Two comb jellies have fused together and are being probed by a pipette.

These Frankenstein-Like Sea Creatures Can Actually Fuse Their Bodies Together

Two comb jellies can merge their digestive and nervous systems and even sync their bodily functions, according to new research. The discovery could have implications for human medicine

Jellyfish are among the planet’s simplest creatures, made up of about 95 percent water and lacking brains, spines, blood or hearts.

Delight in These 15 Photos That Capture the Exotic Undersea Lives of Jellyfish

Despite their often dangerous stings, these creatures create serene scenes as they float through the deep sea

Box jellyfish are about the size of a grape.

Brainless Jellyfish Are Capable of Learning, Study Suggests

Scientists provide evidence that tiny Caribbean box jellyfish—which lack a central nervous system—can learn to navigate through mangrove roots

An artistic reconstruction shows a group of Burgessomedusa phasmiformis swimming in the Cambrian sea.

These 508-Million-Year-Old Fossils May Be Earth’s Oldest Swimming Jellyfish

Researchers found the rare remains in Canada

Australian spotted jellyfish typically reach up to 18 to 20 inches in diameter.

Invasive Australian Spotted Jellyfish Washes Up on Texas Beach

The prolific jellies can form huge swarms and clear zooplankton from wide areas of water, sending ripple effects up the food chain

Innovators may want to create soft robots that more accurately replicate the dynamics of an elephant’s trunk.

Seven Scientific Discoveries From 2022 That May Lead to New Inventions

Nature is a breeding ground for innovative solutions to everything from aging to plastic pollution

Immortal jellyfish (Turritopsis dohrnii) are smaller than the nail on your pinky finger.

‘Immortal Jellyfish’ Could Spur Discoveries About Human Aging

After reaching maturity, these deep-sea creatures can revert to a juvenile stage and repeat their life cycle

A flashy jewel bug butt. 

Science Twitter's 'InverteButt Week' Puts Backsides on Display

The behinds of spineless organisms are diverse among species and serve a multitude of purposes beyond expelling waste

Researchers attached green LED lights along the gillnet float line to keep unwanted marine animals from getting stuck.

Lit-Up Fishing Nets Dramatically Reduce Catch of Unwanted Sharks, Rays and Squid

Decorated nets entrapped fewer undesirable animals without significantly impacting the amount of target fish caught

Scientists built this synthetic fish using paper, plastic, gelatin and human heart cells.

Scientists Build an Artificial Fish That Swims on Its Own Using Human Heart Cells

The experiment could advance pacemaker technology and bring science closer to developing artificial hearts for people

In the video, the giant jellyfish's large bell is seen pulsing and glowing a faint orange as it floats in the dark abyss.

Watch This Giant Phantom Jellyfish With 33-Foot-Long Arms Float Through the Deep Ocean

The footage was captured by a remote-operated vehicle about 3,200 feet below the surface in Monterey Bay, California

Hammerhead sharks have are considered critically endangered.

More Than a Third of Shark Species Are Now Threatened With Extinction

Overfishing, habitat loss and climate change are behind the 'desperate' decline

A perfect storm of high demand clashing with supply chain issues, worker shortage and delivery problems is forcing restaurant owners to raise seafood prices on their menus.

Seafood Prices Soar Amid Supply Chain Issues and Worker Shortage

As demand for fish rises, restaurants are slammed with employment losses, port congestion, lack of product, rising costs and shipment snags

This jellyfish, Scolionema suvaense, was raised in the National Museum of Natural History’s Invertebrate Zoology “AquaRoom.” Here, the species is sinking through food with its tentacles spread wide.

Live Jellyfish Make a Splash in Marine Education

Smithsonian's AquaRoom helps scientists learn more about these animals’ lives and educate future generations about their marine neighbors

A viral video shows an octopus (not pictured) lashing out at an Australian tourist in shallow water.

A Very Angry Octopus Goes Viral After Lashing Out at an Australian Tourist

A video posted to social media captures the cephalopod's arm-flinging attack

This year's top ten titles explore the cosmos, fear and cleanliness alongside narratives about owls, fish and eels.

The Ten Best Science Books of 2020

New titles explore the mysterious lives of eels, the science of fear and our connections to the stars

These 'Elvis Worms' Shimmer and Sparkle—and Fight Rough

New research describes four species of iridescent deep-sea creatures that sparkle like bedazzled Elvis Presley jumpsuits

Comb jelly larvae, highlighted by red arrows, shown inside an adult.

Invasive Comb Jellies Might Overproduce Babies in Summer to Eat Them in Winter

Comb jellies might have evolved to eat their young when prey runs out, but some experts are skeptical of the strategy

The full fossil with the body of the squid on the left and the fish to the right.

200-Million-Year-Old Fossil Captures Squid Viciously Entangled With Its Prey

The specimen may be the earliest known example of a squid-like creature on the attack

Researchers have discovered an unexpected way that larger bits of plastic are transformed into microplastics in the sea: lobsters. (The study involved Norway lobsters, pictured here.)

Norway Lobsters Crush Ocean Plastic Into Even Smaller Pieces—and That's Bad

The crustaceans' guts pulverize plastics into tiny bits that can be consumed by even smaller creatures at the base of the ocean food chain

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