Articles sur Fish

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A three-banded clownfish (Amphiprion ocellaris) navigates the anemones of the Andaman Coral Reef, India. Ritiks/Wikipedia

Why does Nemo the clownfish have three white stripes? The riddle solved at last

Our children all know the little clownfish Nemo, star of the Pixar film. But why does he have three stripes, rather than one or two? Developmental and evolutionary biology are revealing the answer.
When a stream enters a culvert, the flow can be concentrated so much that water flows incredibly fast. So fast, in fact, that small and juvenile fish are unable to swim against the flow and are prevented from reaching where they need to go to eat, reproduce or find safety. Shutterstock

How did the fish cross the road? Our invention helps them get to the other side of a culvert

Our new invention tackles one of the greatest impediments to fish migration in Australia: culverts, those tunnels or drains often found under roads.
Zebrafish are known for their black and gold stripes. NICHD/flickr

How the zebrafish got its stripes

Zebrafish are known for their black and gold stripes, but researchers are still figuring out how pigment cells interact to form these patterns.
A fisherman checks his fish corral nets in the Cau Hai lagoon, Vietnam. Mark Andrachuk

Lessons for sustainable fisheries are hiding in plain sight

When it comes to small-scale fisheries, there is no one route to sustainability. Finding success stories can help map those paths.
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

The origins of those sexual organs: a fishy tale much more primitive than we thought

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. (Shutterstock)

Not all marine fish eat plastics

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.
Exposure to omega-3 fatty acids during a child’s early years may play a role in reducing breast cancer risk later in life. (Shutterstock)

How fish may reduce your child’s breast cancer risk

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. Unsplash

The fishy problem of underwater noise pollution

The noise from motor boats, sonar and other industrial activity interferes with the underwater chatter of fishes.
The Amazon rainforest is fed by a rich network of creeks, streams and rivers. Informal road construction is now endangering this critical ecosystem. Rickey Rogers/Reuters

Amazonian dirt roads are choking Brazil’s tropical streams

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. (Brynn Devine)

Caught on camera: Ancient Greenland sharks

Using baited cameras scientists have captured some of the first underwater video footage of the elusive Greenland shark.

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