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cephalopod

An artistic rendering shows the mysterious animal, which researchers now say was a nautilus relative, in its prehistoric environment.

This Fossil Held the World Record for the Earliest Known Octopus. Turns Out, It’s Not an Octopus After All

New research suggests the 300-million-year-old specimen is actually a relative of the nautilus

A common octopus (Octopus americanus) raises its arm in southern Florida.

Scientists Map the Ways Octopuses Use Their Complex Arms, Revealing Preferences for Certain Tasks

The cephalopods appear to favor using their front arms, according to a new study, though their back arms help with locomotion

For the experiments, the scientists worked with plain-body octopuses (Callistoctopus aspilosomatis).

Octopuses Fall for the Rubber Hand Illusion, Just Like Humans, Pointing to a Sense of Body Ownership

The trick that plays with awareness of one’s own limb appeared to fool all six of the cephalopods tested in a series of experiments

A Honduran white bat (Ectophylla alba) flies from its roost.

Ten Stunning Nature Photos From the BigPicture 2025

From the beautiful to the bizarre, this annual photographic showcase shines a light on some of our planet’s most breathtaking species and places

The squid species had only been known from dead specimens found in fishing nets or the stomachs of other animals.

Scientists Had Never Seen This Mysterious Squid Alive in the Wild—Until Now. See the First Footage of the Elusive Creature

A three-foot-long Antarctic gonate squid was spotted swimming 7,000 feet below the surface of the Southern Ocean

The newly described octopus, Opisthoteuthis carnarvonensis, has red tentacles.

A New, Shape-Shifting ‘Flapjack’ Octopus Has Been Discovered in the Deep Sea Off the Coast of Australia

The tiny Carnarvon flapjack octopus is the latest of ten species described by Australian scientists after a 2022 research trip

During the squid run, tens of thousands of opalescent squids (Doryteuthis opalescens) gather together.

In Order to Unravel the Many Mysteries of Squids, Scientists Dive Into Their Mating Frenzies

Marine biologists hope to find out more about a creature that is vital to a healthy ecosystem and the state’s fishery

A variety of marine creatures and unique features can be found in the deep sea off Norway, including the dumbo octopus, colorful anemones and venting chimneys.

As Norway Considers Deep-Sea Mining, a Rich History of Ocean Conservation Decisions May Inform How the Country Acts

In the past, scientists, industry and government have worked together in surprising, tense and fruitful ways

Researchers recently captured the first-ever confirmed video of the colossal squid in its natural habitat.

Check Out the First Confirmed Footage of the Colossal Squid, a Rare and Enigmatic Deep-Sea Species

Most of what we know about the elusive creature comes from research on its remains found in whale stomachs, but scientists just filmed a one-foot-long juvenile in the South Atlantic Ocean

Researchers spotted an orange blob near a shark's head. It turned out to be an octopus along for a ride.

Watch an Octopus Hitch a Ride on a Shark—an Unusual Duo Dubbed the ‘Sharktopus’

Researchers in New Zealand captured the odd pairing on video, but they still don’t know how to explain the behavior

A giant phantom jellyfish floats in the Bellingshausen Sea off Antarctica.

A Chicago-Sized Iceberg Broke Off From Antarctica, Revealing a Hidden Ecosystem Never Seen Before

When the A-84 iceberg calved in January, it unveiled a 209-square-mile swath of seafloor. Nearby scientists rushed to the scene for the “unprecedented” look below

When they're alarmed, blue-lined octopuses display iridescent blue rings on their arms to ward off approaching predators.

These Male Octopuses Use Venom to Subdue Female Mates—and Avoid Being Eaten After Sex

Scientists observed male blue-lined octopuses injecting tetrodotoxin into females, which rendered them immobile for mating

A broadclub cuttlefish, the second largest cuttlefish species, blends into the ocean floor.

Watch Cuttlefish Use Camouflage to Confuse Crabs, Taking on the Appearance of Coral and Leaves

Scientists have captured footage of the sea creatures using four distinct color-shifting techniques to trick their prey

A team of scientists in the Red Sea captured footage of a big blue octopus hunting with other fish species.

New Research

Watch Octopuses Team Up With Fish to Hunt—and Punch Those That Don’t Contribute

The collaboration across species reveals a surprising social behavior of octopuses, researchers say

This rare leucistic green sea turtle was discovered among nests, supported by local conservation efforts, in Papua New Guinea’s Conflict Islands.

See 15 Stunning Images From the Ocean Photographer of the Year Awards

The winning and highly commended underwater photography spotlights breathtaking animal behavior, conservation needs and the otherworldly environment of Earth’s oceans

While scientists have seen colossal squid before—like this specimen examined by New Zealander researchers in 2014—their interactions have always been with animals that were either pulled from the depths, washed up on shore or otherwise removed from their natural habitat.

Is This the First Recorded Footage of a Colossal Squid Living Freely?

The only sightings of the animals so far have come from corpses or creatures dragged up from the depths

A two-spot octopus at the Aquarium of the Pacific in California. Female two-spot octopuses lay an average of 70,000 eggs.

Family Accidentally Ends Up With 50 Baby Octopuses After Their Pet—Thought to Be Male—Laid Dozens of Eggs

Now, the Oklahoma residents are working with aquariums and researchers that might take the babies

The otherworldly form of the octopus has inspired millennia of fear and awe from humans.

Ten Wild Facts About Octopuses: They Have Three Hearts, Big Brains and Blue Blood

These bizarre creatures have been around for hundreds of millions of years, and for humans, they’ve inspired horror, admiration and culinary prestige

A mother "Dorado" octopus, one of the newly announced species, protects her eggs some 3,000 meters under the ocean's surface.

Biologists Discover Four New Octopus Species in the Deep Ocean Off Costa Rica

One species was found brooding eggs near low-temperature hydrothermal vents, a rare sight that could unlock new information on deep-sea cephalopods

Turquet’s octopus

Octopus DNA Reveals Clues to When the West Antarctic Ice Sheet Last Collapsed

Understanding the ice sheet’s past could help researchers shed light on its future melting

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