Loren E. Babcock, The Ohio State University, introduces research on Cladoselache, a puzzling ancient shark-like fish ...

This 419-million-year-old fossil prompts scientists to rethink how the living groups of jawed vertebrates acquired their characteristic features. This 419-million-year-old fossil prompts scientists to ...

Urea—the main component of human urine—plays an important role in the timing of maturation of sharks, rays and other cartilaginous fish. A new study by researchers with the Sea Around Us initiative at ...

The fossil record shows that cartilaginous fish evolved at least 420 million years ago, and rapidly diversified to become one of the most species-rich groups of predators on Earth. While they have ...

Scientists have discovered that both bony and cartilaginous fish develop their appendages via a shared mechanism -- the mechanism is also observed in land-dwelling vertebrates such as mice. They found ...

We have established a cartilaginous fish cell line [Squalus acanthias embryo cell line (SAE)], a mesenchymal stem cell line derived from the embryo of an elasmobranch, the spiny dogfish shark S.

In 2015, two members of the Blue Beach Fossil Museum in Nova Scotia found a long, curved fossil jaw, bristling with teeth. Sonja Wood, the museum's owner, and Chris Mansky, the museum's curator, found ...

In 1878, German anatomist Karl Gegenbaur proposed a theory that fish fins and human limbs evolved from a structure that resembles gill arches, a collection of bony "loops" in fish that support the ...

A newly discovered fish fossil is the earliest known creature with what might be recognized as a face. Entelognathus primordialis was an ancient fish that lived about 419 million years ago in the Late ...

Today, ray-finned fish, which belong to the bony fish, are by far the most biodiverse fish group in both salt- and freshwater. Their spectacular variety of forms ranges from eels, tuna, flounders and ...