Oceans

Brazilian reef octopuses, like other types of cephalopods, defend themselves against predators by inking and extending their mantles. 

Octopuses May Have Vivid Nightmares, Video Suggests

Costello, a male Brazilian reef octopus, had "bizarre" defensive outbursts while sleeping in a lab

The three-foot-long fiberglass mermaid sold for $300 at auction.

Who Wants to Buy the Creepy Dolls and Bowling Balls That Wash Up on Texas Beaches?

Hundreds of eclectic items were auctioned off to help fund the rehabilitation of sea turtles and birds

The Big Apple's 1,084,954 buildings weigh an estimated 1.68 trillion pounds.

New York City Is Sinking Under the Weight of Its Skyscrapers, Study Finds

As the city, and others like it, slowly subsides, it becomes more vulnerable to flooding driven by climate change

A massive ice island breaks free of the Petermann Glacier in northwestern Greenland in July 2012.

Satellites Show Warming Tides Melting a Massive Greenland Glacier

The finding could mean that past predictions of sea-level rise from glaciers should double

A close-up view of the Titanic's bow

See the Titanic in Stunning Detail With New 3D Scan

Researchers collected 16 terabytes of data to create the very first full-sized 3D scan of the wreckage

This is the first documented rainbow sea slug in a rock pool in the United Kingdom.

Rare 'Technicolor' Rainbow Sea Slug Found in England

It's only the fourth record of the species in the U.K., and experts say it's a sign of warming waters due to climate change

Lost fishing gear can continue to catch and ensnare prey, a destructive outcome called ghost fishing.

The Pioneering Project Paying for Ghost Fishing Gear

A new program is rewarding shrimpers who collect and recycle derelict crab traps

The bathysphere on deck of the Ready, 1930-1934, from Bathysphere and Nonsuch

Inside the First Deep-Sea Dive in History

In 1930, a colorful band of researchers in the Atlantic taught us how to plumb the ocean’s depths

Scalloped hammerhead sharks off the Kona coast of the Big Island of Hawaii

Hammerhead Sharks Can 'Hold Their Breath,' A First for Fish

The sharks close their gills to stay warm while hunting in deep, frigid waters, new research suggests

A high-temperature hydrothermal vent field discovered on Puy des Folles Seamount on the Mid-Atlantic Ridge at approximately 6,562 feet in depth.

See the Breathtaking Ocean Life Found at Deep-Sea Vents

An international team of scientists discovered new hydrothermal vents along the Mid-Atlantic Ridge releasing mineral-rich water hot enough to melt lead

Fossils in Wales reveal a glimpse into marine life 462 million years ago. In this illustration based on the new finds, the tall sponge in the foreground is less than one inch in height.

This Trove of Fossils in Wales Is Revealing Secrets of Early Animal Life

Scientists have uncovered 170 species from around 462 million years ago, unveiling surprises about when tiny marine creatures evolved and disappeared

Using suction-cup sensors attached to three humpback whales, researchers captured video footage of the animals rolling around on the ocean floor.

Watch Whales Exfoliate Their Skin on the Ocean Floor

Migrating humpbacks used sand and rubble to slough off dead skin and barnacles, a behavior that may be both practical and social

Male California sea lions are polygamous and must fight to defend their territories and their harems.

Why Male California Sea Lions Are Getting Bigger

The “raccoons of the sea” have varied diets, allowing them to grow large to compete for mates

Before they made their big flight to the South Pacific, the snails were adorned with dots of red, UV-reflective paint to help conservationists find them in the dark.

Scientists Reintroduce 5,000 Snails to French Polynesian Islands

The project's organizers say it's the largest-ever release of creatures that are extinct in the wild

The eruption of a volcano on Spain’s La Palma island took a toll on nearby fish.

The Gruesome Ways Volcanoes Kill Fish

Whether the eruption is underwater or on land, the creatures don’t have an easy time dealing with nature’s fury

Michigan’s Mission Point Lighthouse is perched on the tip of Old Mission Peninsula 17 miles north of Traverse City.

Five Lighthouses Where You Can Be an Overnight Keeper

Programs from Massachusetts to Alaska allow volunteers to try their hand at the job

An American submarine sank the Montevideo Maru in 1942, causing Australia's largest loss of life at sea.

Searchers Find WWII Ship That Sank With More Than 1,000 Allied POWs Aboard

Unaware that the "Montevideo Maru" was transporting prisoners, an American submarine torpedoed the Japanese ship in 1942

Huge quantities of plastics make their way into oceans and other bodies of water.

The Pacific Garbage Patch Is Home to Coastal Species—in the Middle of the Ocean

These out-of-place organisms are thriving on floating trash, but they may compete with open-water species

The submersible Alvin collects samples from rocky outcrop in the newly discovered coral reef.

See the Pristine Coral Reefs Found off the Galápagos Islands

These ancient deep-sea reefs have barely been affected by humans and can provide a way to measure the impact of climate change on corals

An illustration of the Snowball Earth with some open water around the equator and a newly proposed patch of ocean at mid-latitudes

How Life Could Have Survived the Frozen ‘Snowball Earth’

During a prehistoric ice age when the planet was enveloped in glaciers, algae could have made a living in patchy, open oceans, study suggests

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