A trade-off between tooth size and jaw mobility has restricted fish evolution, Nick Peoples at the University of California Davis, US, and colleagues report in the open-access journal PLOS Biology .

Ray-finned fish, now the most diverse group of backboned animals, were not as hard hit by a mass extinction event 360 million years ago as scientists previously thought.

Near the rocky beaches of inner Nova Scotia, a researcher’s hunch led to the discovery of a new prehistoric species. /iStock ...

C. wildi was an early ray-finned fish – possessing a backbone and fins supported by bony rods called “rays” – that is thought to have been 6 to 8 inches long, swum in an estuary, and ate ...

Tuna, opah, and billfishes such as marlins and swordfish are among the 0.1% of fish species that are warm-blooded. Evidence ...

They’re a type of ray-finned fish, which began their evolution journey around 395 million years ago. These prehistoric fish belong to the genus Polypterus , which means “many wings.” ...

Coelacanths' fins move in a synchronized pattern similar to four-limbed animals. Coelacanths have center pointed tail fins instead of forked or crescent shaped tails seen in ray-finned fish.

In comparison, most early ray-finned fish would have been around 10 inches. At that size, the fish could have been a top predator in this coastal lake, Lucas said. To this day, Harris says it's ...

C. wildi was an early ray-finned fish – possessing a backbone and fins supported by bony rods called “rays” – that is thought to have been 6 to 8 inches long, swum in an estuary, and ate ...