Sea Creatures

The remotely operated vehicle Hercules explores the hydrothermal vents of Lost City during a 2005 expedition.

Diving Deep to Reveal the Microbial Mysteries of Lost City

An expedition sets out this week to explore a field of hydrothermal vents in the deep Atlantic, one of the most extreme ecosystems on the planet

RangerBot is an autonomous underwater vehicle designed to identify and kill crown-of-thorns starfish by lethal injection.

Sea-Star Murdering Robots Are Deployed in the Great Barrier Reef

The RangerBot is a new line of defense against coral-eating crown-of-thorns starfish

This pipefish couple may seem the picture of romance, but the male may have something bigger and better in mind.

Pregnant Male Pipefish Are the Sea's Swaggery Swingers

Male pipefish, which take on the burden of carrying eggs to term, can compromise their own pregnancies if they see a “huge, sexy female” swimming by

How Hungry Baby Urchins Are Saving Hawaii's Reefs

They helped eat through invasive algae that was suffocating corals in Kāne'ohe Bay

Stormy weather may have rained on these sea urchins' parade—and sealed their fate

See Shells of Sea Spuds on the Seashore

Hundreds of "sea potatoes"—actually the empty shells of a species of sea urchin—mysteriously washed up on Cornish beach last weekend

A Unique Enzyme Gives Bermuda Fireworms Their Glow

A new study reveals the secret to the invertebrates’ dazzling mating ritual

After Being Stolen in Baby Stroller, Miss Helen the Shark Is Back at San Antonio Aquarium

Two men and one woman are suspected of swiping Miss Helen in a planned heist

Closeup of a stomatopod crustacean

Why Mantis Shrimps, Not Sharks, Might Be the Most Amazing Predators in the Sea

The crustaceans have superpowers other animals can only dream of

A Clever Cuttlefish Goes in for the Kill

In a sandy gully, a school of razorfish are being stalked by an invisible predator and a master of disguise: the crafty cuttlefish

How Spawning Squid Offer a Buffet for Predators

During spawning season, calamari squid become vulnerable in the shallow waters. But they do have one weapon that helps improve their odds

The Remarkable Way Calamari Squid Catch Their Prey

They might be delicious to us but in the ocean, calamari squid are formidable predators, using concealed tentacles which shoot out toward any prey

Soft tumors make life hard for sea turtles.

Should We Share Human Cancer Treatments With Tumorous Turtles?

They may be key to saving wild sea turtles from tumors associated with turtle-specific herpes

Do Marine Mammals Yawn and More Questions From Our Readers

You asked, we answered

River eels exposed to cocaine suffered muscle damage and other health effects.

Cocaine in the Water Is Hurting River Eels

When researchers exposed eels to the illicit drug, the animals became hyperactive and suffered muscle damage

Introducing a Hairy-Footed Shrimp Named After Bilbo Baggins

Like its hobbit namesake, Odontonia bagginsi is also quite small

Fully 73 percent of the patents studied in the paper pertained to microbial species, which account for about 20 percent of marine life.

Nearly Half the Patents on Marine Genes Belong to Just One Company

Who owns biodiversity? No one and everyone—or maybe, a German chemical company

An artist's impression of an adult and juvenile Lyrarapax unguispinus — awww, how adorable!

This Prehistoric Sea Creature Had Fanged, Killer Babies

The discovery of a juvenile <i>Lyrarapax unguispinus</i> fossil reveals that even the tiny terrors had a developed claw-like appendage and sharp teeth

Whale Dies in Thailand With 80 Plastic Bags in Its Stomach

A five-day rescue effort could not save the animal, which started vomiting up pieces of plastic before it died

The first blue whale ever seen in the Red Sea.

Huge Blue Whale Sighted in the Red Sea for the First Time

The massive mammals typically spend their summers in polar waters, but are known to occasionally migrate further

When it comes to diving, humans can't hope to keep up with flippered mammals. But an anatomist thinks she may have identified a crucial structure in dolphins that could help humans avoid the bends.

Dolphins Have a Mysterious Network of Veins That Could Be Key to Preventing the Bends

It might be possible to make an external device that protects divers from the deadly condition

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