Sea ice trapped atmospheric carbon dioxide in the last ice age.
The last ice age locked atmospheric carbon dioxide into oceans, which has major implications for how the oceans and carbon dioxide may be linked in the future.
Salt flows down rivers to the ocean.
A special combination of rain, rocks and subsea volcanoes makes the sea salty.
Pike Place Market, Seattle.
A new study shows that sustainable fish farming in deep ocean waters could produce as much seafood as all of the world's wild fisheries, in a space the size of Lake Michigan or Africa's Lake Victoria.
Plastic trash on San Francisco’s Ocean Beach.
A new study shows that anchovies – key food for larger fish – are attracted to plastic trash because it smells like food. This suggests that toxic substances in plastic could move up through food chains.
Giant kelp can grow up to 60cm a day, given the right conditions.
In an extract from his new book, Tim Flannery explains how giant kelp farms could suck carbon dioxide from the air and store it in the ocean's depths, while encouraging species like fish and oysters.
Hey, what about us? Whale shark (spotted) and manta ray, a close shark relative.
As the Discovery Channel and National Geographic Wild unleash a week of dueling shark programs, a biologist advises viewers to take what they see with a large grain of sea salt.
Great white photobomb.
George T. Probst/NOAA/Flickr
The world's oceans are home to innumerable life forms, from sponges to sea lions, and scientists have many creative ways of studying them.
The famous “faceless fish”, which garnered worldwide headlines when it was collected by the expedition.
Surveying the bottom of the ocean turns out to be far from easy. But there was something wonderful about seeing animals we have only read about in old books.
Furious winds keep the McMurdo Dry Valleys in Anarctica free of snow and ice. Calcites found in the valleys have revealed the secrets of ancient subglacial volcanoes.
Melting ice from Antartica could feed vast plankton blooms, trapping carbon in the ocean. To understand this complex mechanism, researchers looked at volcanoes deep under glaciers.
U.S. Navy diver off the coast of Guantanamo Bay, Cuba.
MC2 Kori Melvin, U.S. Navy/Wikipedia
Cuban and US scientists are forming partnerships to protect coral reefs and fisheries in both countries. But President Trump may soon announce steps to slow or reverse the US opening to Cuba.
Humpback whales getting a feed.
Janie Wray/North Coast Cetacean Society
A new study shows that the way humpback whales choose their habitats is affected by humans.
The researchers found nearly 38 million pieces of plastic rubbish on Henderson Island, in one of the remotest parts of the ocean.
Plastics pose a major threat to seabirds and other animals, and most don't ever break down - they just break up. Every piece of petrochemical-derived plastic ever made still exists on the planet.
Fish leave bits of DNA behind that researchers can collect.
Mark Stoeckle/Diane Rome Peebles images
Animals shed bits of DNA as they go about their lives. A new study of the Hudson River estuary tracked spring migration of ocean fish by collecting water samples and seeing whose DNA was present when.
NERC / National Oceanography Centre
The new sub allows scientists to access some of the most remote and hazardous environments in the ocean.
In sharks’ territory.
Warm Winds Surf Shop/Flickr
Professional surfers have called for culling sharks to reduce the risk of attacks. A shark biologist explains why culling will not work and surfers should accept risk when they enter the water.
Mothers and children handlining for fish in the evening in Kavieng, Papua New Guinea.
Coastal indigenous peoples consume nearly four times more seafood per capita than the world average and have strong cultural ties to the sea. Global ocean policies should preserve these connections.
Monstrous, or just misunderstood?
National Oceanic and Atmospheric Administration
People are more likely to support conservation for cute rather than creepy-looking animals.
A NOAA vessel explores the the Northeast Canyons and Seamounts Marine National Monument, the first in the Atlantic Ocean.
One of the environmental legacies of the Obama administration is ocean reserves. Two ocean scientists explain why these are a critical but not sufficient piece of conservation.
Microplastics can carry other pollutants.
Oregon State University/Flickr
Up to 236,000 tonnes of microplastic enter our oceans each year.
Whitespotted surgeonfish (
Acanthurus guttatus), found in the Indo-Pacific, crop the upper portion of algae while feeding, preventing macroalgae from becoming established on reefs.
Plant-eating fish control the spread of seaweed and algae on coral reefs. New research explaining why populations of these fish vary from site to site could lead to better reef protection strategies.