A school of juvenile bocaccio in the midwaters of Platform Gilda, Santa Barbara Channel, Calif.
Californians love their coast and strongly oppose offshore drilling. Will they support converting old oil rigs to artificial reefs – a policy that benefits both marine life and oil companies?
Climate change could further stress species such as Atlantic cod that already are threatened by overfishing.
Tiny calcified formations inside fishes' ears can be used to trace a fish's life history – and potentially, how climate change has affected its growth and development.
A sperm whale goes down for a dive off Kaikoura, New Zealand.
Protecting forests and wetlands, which absorb and store carbon, is one way to slow climate change. Scientists are proposing similar treatment for marine animals that help store carbon in the oceans.
Nurdles are a raw feedstock used to make most of the plastic products we use everyday, but they're flooding the ocean as "mermaid tears".
A young shore crab displaying varied colouring.
Citizen science game offered clues to why shore crabs get greener as they grow.
Alexey Suloev / shutterstock
New research shows how marine mammals ignore the rules of biology to thrive in the world's coldest waters
Hull Peninsula and part of the Boston Harbor Islands National Recreation Area.
A few decades ago Boston Harbor was one of the nation's dirtiest water bodies. Now, healthier fish in the harbor underscore that a multibillion-dollar cleanup has succeeded.
Scalloped hammerhead entangled in a Queensland shark control net at Magnetic Island, Townsville.
Courtesy of Nicole McLachlan
Some media have reported shark numbers at 'plague proportions' in Australian waters. But a new analysis suggests the opposite: species such as hammerheads and white sharks have plummeted in number.
Deep sea corals off Florida.
A massive new discovery this summer of miles of corals in deep waters off South Carolina shows how much we have yet to learn about life on the ocean floor.
Mangroves growing strong.
Mangrove forests grow in the tidal lagoons of tropical coastlines and they could actually benefit from climate change. Here's what that means for us.
Researching the most resilient corals could help us find ways to better protect reefs in the future.
Building an artificial reef.
Coral reefs are in crisis around the world, and may disappear entirely. 3D printing is a new idea to help them – but it won't be a cure all.
Warning sign at a Cape Cod beach.
The return of white sharks to Cape Cod, Massachusetts was a tourism success story – until a shark killed a swimmer. Can the Cape's residents and visitors learn to share the ocean with these apex predators?
Inside a snailfish.
Newcastle University / Natural History Museum, London
These 'snailfish' look too fragile to exist several miles below the waves.
St Agnes, Cornwall.
If we know what makes species tick, we can start truly understanding life on the UK's coast.
Elusive and mysterious by nature, ordinary people are revealing the secrets of the UK's octopuses.
Watch out for these tiny tough guys.
Roy L. Caldwell, Department of Integrative Biology, UC Berkeley (For use only with this article)
With superpowers other animals can only dream of, these crustaceans challenge sharks for the title of most amazing predator in the sea.
Tech fixes to environmental problems are guaranteed to grab attention, but real change for the planet requires community organising.
Soft tumors make life hard for sea turtles.
Sea turtles contend with a contagious disease that causes debilitating tumors. Genetic analysis is helping researchers figure out precision medicine-based treatments for the turtles.
New research shows just how different male and female sharks can be.