Oceans

To get a glimpse of what's happening in the deep blue, scientists deployed instruments to measure changes on the sea floor. This hydrothermal vent exists at 3,300 meters deep.

The Deepest, Darkest, Most Frigid Depths of the Ocean Are Warming

Thermometers anchored to the seafloor revealed that even the deep sea is not impervious to rising global temperatures

The barriers are designed to stay at the bottom of the lagoon until they are activated, fill with air and rise to the surface to seal off the lagoon's inlets.

Venice's Controversial Inflatable Floodgates Save City for the Second Time

The barriers may not be permanent solutions, but they've now protected Venice from two floods this month

Fish and corals on Australia's Great Barrier Reef. Between a quarter and a third of all marine species spend some part of their life cycle in coral reefs.

Climate Change Has Killed Half of the Great Barrier Reef's Corals

A new study finds corals on the Australian mega-reef declined 50 percent between 1995 and 2017

Theories surrounding the source of the pollution are still swirling.

Hundreds of Dead Animals Wash Ashore on Russian Beach After Reports of Mysterious, Toxic Sludge

Investigations are still underway, but experts theorize that leaked hazardous materials from military bases are to blame

The Pacific bigfin squid Magnapinna pacifica in the Smithsonian collections that Mike Vecchione and Richard E. Young used to describe the deepest-known species of squid.

The Wonderfully Weird World of Deep-Sea Squids

For this month's "Meet a SI-entist," the Smithsonian's curator of cephalopods says these are the "intelligent invertebrates"

Blue whales are the world’s largest animals, and they can grow to the length of three school buses in a row.

Blue Whales Sing All Day When They Migrate and All Night When They Don't

Their mysterious songs could be an 'acoustic signature of migration'

Researchers with OCEARCH caught a 17-foot-long great white shark on the morning of October 2.

Researchers Catch and Tag 17-Foot 'Matriarch of the Sea,' a 50-Year-Old Great White Shark

The OCEARCH team named the shark Nukumi, the Mi'kmaq people’s word for 'grandmother'

The squalene industry kills around 3 million sharks each year, and if squalene is used in a vaccine to treat everyone in the world, up to half a million sharks will be killed.

500,000 Sharks Could Be Killed in the Race to Produce a Covid-19 Vaccine

Vaccine developers seek a compound called squalene produced in shark livers

A female megalodon model, based on a set of teeth discovered in the Bone Valley Formation in Florida, hangs in The Smithsonian National Museum of Natural History.

How Cannibalism in the Womb May Have Made Megalodon a Titanic Terror

A new analysis of shark body size offers clues as to why the 50-foot-long prehistoric shark grew so large

Hundreds of pilot whales are stranded on a sand bar on September 21, 2020 off the west coast of Tasmania.

Hundreds of Whales Die in Mass Stranding in Australia

Nearly 500 pilot whales were stranded off the coast of Tasmania last week, in what officials say is the largest mass stranding event in Australian history

Historical pressings of seaweeds, such as this kelp, have proved to be a scientific boon for researchers.

Scientists Use Century-Old Seaweed to Solve a Marine Mystery

A treasure trove of data trapped in pressed seaweed helps explain the collapse of Monterey Bay's sardine fishery in the 1950s

The Delmenhorst sank in an October 1644 maritime battle.

Wreck of 17th-Century Danish Warship Found in the Baltic Sea

The "Delmenhorst" sank during a 1644 naval battle between Denmark and a joint Swedish-Dutch fleet

Indian fishermen row their boat on the Bay of Bengal.

Undersea Earthquakes May Help Us Take the Ocean’s Temperature

The technique could allow for more accurate and comprehensive monitoring of the world’s warming oceans and track climate change

A humpback whale breaches off the coast near Alameda, California. Ships collide and kill an estimated 80 endangered whales a year off of the West Coast.

Innovative New Whale Detection System Aims to Prevent Ships From Striking Animals

Whale Safe launches in Southern California waters to help reduce deaths of the iconic marine mammals

Sediments recovered from the Great Blue Hole, off the coast of Belize, hint at extremely severe storms during the late Classic period in Maya history.

Severe Cyclones May Have Played a Role in the Maya Collapse

Sediment cores from the Great Blue Hole reveal that a series of extreme storms hit the region after 900 A.D.

Fabien Cousteau's Proteus will be the first underwater research habitat built in decades.

Jacques Cousteau's Grandson Wants to Build the International Space Station of the Sea

Off the coast of Curaçao, at a depth of 60 feet, aquanaut Fabien Cousteau is looking to create the world's largest underwater research habitat

The stomach of a 15-foot fossil ichthyosaur excavated in China contained this massive chunk of another large marine reptile. The ichthyosaur swallowed its prey shortly before it died and was fossilized.

This 15-Foot Ichthyosaur Died With a 13-Foot Meal in Its Stomach

The shocking size of the marine predator’s quarry may force paleontologists to rethink the marine reptile’s role in the Triassic ecosystem

Viruses, notably influenza A and Morbillivirus, cause mass die-offs with striking head counts.

Mass Die-Offs of Marine Mammals Are on the Rise

Viral and bacteria outbreaks are increasingly causing fatalities in a variety of species, including seals and dolphins

Alvin, a remotely operated submersible, drills for samples of the deep sea floor in 2014.

Deep-Sea Microbes Exert the Least Amount of Energy Possible to Survive

Giving a whole new meaning to doing the “bare minimum”

An artist's illustration of the Triassic reptile Tanystropheus hydroides hunting with its long neck.

Study Reveals This Mysterious, Super Long-Necked Triassic Reptile Was a Marine Hunter

The creature’s neck was stiff like a giraffe’s and was nearly three times the length of its torso

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