A boat propeller encrusted with zebra mussels.
Zebra and quagga mussels entered the Great Lakes in large ships’ ballast water. Now, local boaters and anglers are spreading them into the southern and western US.
davidpstephens / shutterstock
As the oceans warmed, great whites were more adaptable.
The sticky biofilms that form on microplastics can harbor disease-causing pathogens and help them spread.
Tunatura/iStock via Getty Images Plus
Normally land-bound pathogens that cause deadly diseases for both humans and animals can cling to microplastics and end up in your seafood.
Travel Faery / shutterstock
Certain combinations of genetic material are being conserved through the generations.
Northern map turtles are only one of the freshwater turtle species threatened by human activity.
Increased motorboat activity has resulted in an alarming increase in turtle injuries. Northern map turtles are an at-risk species, and boat collisions threaten their survival.
Tampa Bay’s sea grass meadows need sunlight to thrive. Algae blooms block that light and can be toxic to marine life.
Joe Whalen Caulerpa/Tampa Bay Estuary Program via Unsplash
Harmful algae blooms are an increasing problem in Florida. Once nutrients are in the water to fuel them, little can be done to stop the growth, and the results can be devastating for marine life.
Javarman / shutterstock
How Pacific winds interact with the sea to bring colder waters up from the depths.
A decline in the African penguin population has major knock-on effects for the marine and terrestrial ecosystems.
Penguins are sensitive to ecosystem changes such as reduction of available prey, pollution and climate change. Their presence and abundance is indicative of a healthy and balanced ecosystem.
New research points to ‘heavy metals’ having unseen effects on a much larger scale than previously thought.
Oskari Porkka / shutterstock
Cold-water plankton is being replaced by warm-water species.
Courtesy Lalela uLwandle
Empatheatre’s latest production is more than a play about three characters who live near the sea. It’s a model for collective consultation on how to save the ocean.
CT scan of a catshark hatchling head. Note the ridged scales.
Rory Cooper, Kyle Martin & Amin Garbout/Natural History Museum London
Shark skin is composed of millions of tiny scales, which have a similar chemical composition to human teeth.
Evening light on a Heard Island icescape. The island is part of the Kerguelen Plateau, which is being jointly studied by France and Australia.
Scientists are uncovering the secrets of a giant undersea rock shelf, parts of which lie four kilometres below the ocean’s surface.
The SeaGen tidal generator in Northern Ireland leaves turbulent water – and lots of fish – in its wake.
Alex Nimmo Smith
New research finds birds like to forage for fish in the wake of a tidal power plant.
Alexey Suloev / shutterstock
New research shows how marine mammals ignore the rules of biology to thrive in the world’s coldest waters
Sydney’s iconic beaches are not yet part of a marine park.
The New South Wales government has turned its back on plans to create sanctuary zones covering 2.4% of waters around Sydney, despite evidence that these ‘no-take’ areas are crucial for protecting fish.
St Agnes, Cornwall.
If we know what makes species tick, we can start truly understanding life on the UK’s coast.
Silent Evolution by Jason deCaires Taylor. Taylor makes sculptures and sinks them beneath the sea to create artificial reefs.
© Jason deCaires Taylor
Not everything humans put in the ocean is garbage. From walls of tyres to sunken sculptures, reef restoration is both a science and an art.
Fishing ships in Lauwersoog, The Netherlands.
Seagrass meadows play a significant role in supporting world fishery productivity.
Normana Karia / shutterstock
We cannot spot every shark in the ocean. But we can detect their ‘environmental DNA’.