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.
Copepod with eggs (blue). Copepods are typically just a few millimeters long, but are important food sources for small fish.
DNA sequencing is making it possible for scientists to identify thousands of species of zooplankton – drifting animals that are key links in ocean food webs.
Normana Karia / shutterstock
We cannot spot every shark in the ocean. But we can detect their 'environmental DNA'.
A pelagic snail ensnares food with with a mucous web.
Linda Ianniello https://lindaiphotography.com
Biologists are finding new evidence that these ocean invertebrate grazers don't just ingest whatever they catch. They can actually be picky eaters – and their choices might influence ocean food webs.
A Kemp’s ridley hatchling makes its way to the water on Padre Island, Texas.
During sea turtle nesting season, scientists collect data and assess how turtles are doing. But they know less about how plastic pollution, fishing and warming oceans are affecting turtle numbers.
The first March for Science, April 22, 2017, Washington DC.
On the eve of the March for Science, a marine biologist explains why she's returning from abroad to speak out for science in the Trump era.
Yellow-bellied sea snake (
Coleman M. Sheehy III, Florida Museum of Natural History
Sea snakes spend their lives in the water, giving birth to live young at sea, so why are they only found in some of the world's oceans? The answer lies in a combination of climate and geography.
Extreme weather led to starfish mass strandings along beaches in Kent and East Yorkshire.
The CSIRO has provided new estimates of population sizes for White Sharks in Australian waters.
How many shark encounters have there been at your local beach? Explore our interactive map to see 20 years of incidents between humans and sharks in coastal waters around Australia.
Nightvision, ejectable stomachs and regrowable arms mean starfish are more than meets the eye.
Image from video of Mariana snailfish.
SOI/HADES/University of Aberdeen (Dr. Alan Jamieson)
The Mariana snailfish lives nearly 27,000 feet underwater, but has features that help it adapt to intense water pressure and cold. Physiological limits may prevent fish from surviving in deeper water.
An animal behaviour expert gives his view on finding that a killer whale can copy the sound 'hello'.