Fluorescence images of Crocosphaera.
In the ocean, phytoplankton helped by diazotrophs play an outstanding role in withdrawing CO₂ from the atmosphere. But climate change is disturbing this delicate balance.
Ocean swimmers often wax lyrical about the benefits of a regular dip in the salt water.
Fishing boats coming into Le Guilvinec, Brittany, France, at the end of the day.
The Atlantic Ocean is still growing physically, but humans are over-harvesting its rich fisheries. The most famous one – North Atlantic cod – has become a textbook example of harmful overfishing.
An international agreement has set an ambitious deadline for action on some of the biggest problems facing the world's oceans.
Some places, like Nazaré Canyon in Portugal, produce freakishly huge waves.
AP Photo/Armando Franca
Some beaches in the world tend to consistently produce huge waves. Places like Nazaré Canyon in Portugal and Mavericks in California are famous for their waves because of the shape of the seafloor.
A female killer whale leaps from the water in Puget Sound near Seattle.
(AP Photo/Elaine Thompson)
Scientists had been uncertain about why killer whales are dying in the northeastern Pacific Ocean. A new study takes an in-depth look and provides the tools to help prevent additional deaths in the future.
A major war between the United States and Russia could make global fish catches fall by as much as 30 per cent.
Marine fish could serve as a crucial global emergency food supply in times of crisis, if marine ecosystems were in a healthy state to start with.
Arctic sea ice levels have been falling for several decades.
The pattern of autumn sea ice growth has been completely disrupted. The director of the National Snow and Ice Data Center explains what's happening.
Eelgrasses covered with small snails, which keep the leaves clean by feeding on algae that live on them.
Healthy seagrasses form underwater meadows teeming with fish and shellfish. A successful large-scale restoration project in Virginia could become a model for reseeding damaged seagrass beds worldwide.
This is up to 35 times more than the estimated weight of plastic pollution on the ocean’s surface.
Hurricanes Marco and Laura swept through the Gulf of Mexico just two days apart in August 2020.
Joshua Stevens/NASA Earth Observatory
It's only happened twice since naming started in 1950, and there's an unusual twist to where many of the storms formed this year.
Hurricane Laura intensified quickly over the Gulf of Mexico before making landfall on Aug. 27, 2020.
CSU/CIRA and NOAA/NESDIS
Laura went from a tropical storm to a major hurricane in less than 24 hours, sending coastal residents scrambling to prepare. Hurricanes Harvey and Michael exploded in strength in similar ways.
After the oil spill, the usual sight of families strolling by the sea was quickly replaced by volunteers working hard in a concerted effort to protect their coast.
Manganese nodules on the Atlantic Ocean floor off the southeastern United States, discovered in 2019 during the Deep Sea Ventures pilot test.
National Oceanographic and Atmospheric Administration
Companies are eager to mine the deep ocean for valuable mineral deposits. But scientists are concerned about impacts on sea life, including creatures that haven't even been discovered yet.
An estimated 640,000 tonnes of lost and abandoned fishing gear enters the oceans annually.
An enormous amount of fishing gear is cut loose in the ocean each year. The losses cut into fishers' profits and kill marine wildlife. A new project aims to get ghost gear out of the ocean.
Residents of Lamu, Kenya, accuse the government of ignoring their concerns and going ahead with the construction of a huge port.
TONY KARUMBA/AFP via Getty Images
Africa's blue economy initiatives focused on economic outcomes. Limited attention was given to social equity and ecological sustainability.
Seagrasses support a wide variety of life.
Reinhard Dirscherl/ullstein bild via Getty Image
Between 1986 and 2016, Kenya lost about 21 of its seagrasses.
New Chrysaora from the coast of South Africa.
Global long-term data simply doesn't exist for jellyfish, so scientists struggle to predict, track and mitigate their potential effects.
Tharp with an undersea map at her desk. Rolled sonar profiles of the ocean floor are on the shelf behind her.
Lamont-Doherty Earth Observatory and the estate of Marie Tharp
Born on July 30, 1920, geologist and cartographer Tharp changed scientific thinking about what lay at the bottom of the ocean – not a featureless flat, but rugged and varied terrain.
Recent shark-related deaths fuel the debate around the best way to keep people safe in the water, without hurting marine wildlife.