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 .

In 2015, two members of the Blue Beach Fossil Museum in Nova Scotia found a long, curved fossil jaw, bristling with teeth.

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.

The species was named Sphyragnathus tyche, combining Greek words “sphyra,” meaning hammer and “gnathus,” meaning jaw for the ...

Buried for 209 million years, a tiny flying reptile and its ancient neighbors just emerged from Arizona’s Triassic past.

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.” ...

The large fish, spanning nearly a metre on the lake bed, lived in waters thick with rival fish, including giants several times its size ...

To find out, Rice recently set out to do a large-scale survey of published research on sound production in ray-finned fishes, or actinopterygians, which represent more than half of all vertebrate ...

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.