Euphanerops, a primitive jawless fish from the World Heritage site at Miguasha, Quebec, which has now been found to have paired hind limb structures and copulatory sex organs.
François Miville-Deschênes with permission
Sexual organs similar to what we see in sharks and rays today appeared many millions of years ago in much more primitive ancient fishes than was previously thought.
A whale shark moves towards a piece of plastic in the ocean.
If we are truly invested in addressing the issue of marine plastic and offsetting the potential harms, we have to understand which fish eat plastic and which ones don't.
Ocean fish are changing where they live due to climate change.
Australia's oceans are warming faster than the global average, and fish are moving south as a result.
Bottlenose dolphins off the coast of New Jersey.
How can marine preserves best protect sea creatures that move in and out of them? Two ocean scientists describe new thinking about designing marine protected areas.
Australia was thought to have some of the most sustainable fisheries in the world, but a recent count has found that fish numbers have plummeted by a third.
New study in mice shows that omega-3 in mother protects babies' gut health for life.
An artist’s reconstruction of the ancient fish
A 400 million year old fossilised fish skull gives us very early and previously unknown clues about how boney fishes evolved into the vertebrates we see today on Earth - including us humans.
Pregnant women should be reassured that eating fish is good for their baby and is very unlikely to cause autism.
Exposure to omega-3 fatty acids during a child’s early years may play a role in reducing breast cancer risk later in life.
New research suggests omega-3s from seafood to be more effective at reducing breast cancer risk than those from plant-based sources.
Boat noise can interfere with the underwater communication of fishes and other marine animals.
The noise from motor boats, sonar and other industrial activity interferes with the underwater chatter of fishes.
Juvenile blue tang sheltering in restored staghorn coral.
With coral reefs in crisis around the world, many organizations are working to restore them by growing and transplanting healthy corals. A new study spotlights techniques that help restored reefs thrive.
Seahorse dads can give birth to more than 1000 baby seahorses at once.
Cindy Zhi/The Conversation NY-BD-CC
The seahorse dads carry the babies in a pouch.
The Amazon rainforest is fed by a rich network of creeks, streams and rivers. Informal road construction is now endangering this critical ecosystem.
Thousands of dirt roads crisscross the Brazilian Amazon, serving ranchers, loggers and miners. The area's fragile waterways — and the spectacular fish that live in them — pay a high price.
A large female Greenland shark observed near the community of Arctic Bay, Nunavut.
Using baited cameras scientists have captured some of the first underwater video footage of the elusive Greenland shark.
Waste not, want not.
Artisanal fishers in Sri Lanka are throwing away more marine species than they keep.
Biofluorescence makes researching cryptic species such as this Lizardfish easier and less harmful.
Maarten De Brauwer
Much of the world's ocean is teeming with 'cryptic' fish species, which are small and hard to spot. But a new technique shines a light on these fish, which may in turn help to keep our seas healthy.
Today’s sharks are known to use electroreception to find their prey.
Many living vertebrates have the ability to detect electric fields, especially in other animals when hunting. But what can the fossil record tell us about the origins of this sensory system?
Tiktaalik: bridging the gap between land and sea.
Zina Deretsky/National Science Foundation
Little skates that 'walk' across the ocean floor show how fish brains evolved to pave the way for working legs.
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.
Villagers enjoying the evening fishing in Kavieng, Papua New Guinea.
Sustainable fisheries tick all the boxes. They can fill your belly and your wallet, and generate less CO2 than conventional agriculture. So why is some integral funding for marine fisheries falling?