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 ...

One quarter of the world's cartilaginous fish, namely sharks and rays, face extinction within the next few decades, according to the first study to systematically and globally assess their fate. One ...

A new study in Genome Biology and Evolution reveals that egg yolk proteins may have been co-opted to provide maternal nutrition in live-bearing sharks and their relatives. While giving birth to live ...

What do we have in common with fish, besides being vertebrates? The types of joints we (and most vertebrates) share most likely originated from the same common ancestor. But it’s not a feature that we ...

Daily supplementation with hydrolyzed fish cartilage may reduce wrinkles and improve collagen morphology in the skin, says a new study from scientists in France and Brazil. “In the clinical evaluation ...

The heaviest cartilaginous fish, and also the largest fish of all, is the whale shark (Rhincodon typus), the largest scientifically recorded example of which measured 12.65 m (41 ft 6 in) long, 7 m ...

While giving birth to live young is a trait that most people associate with mammals, this reproductive mode—also known as viviparity—has evolved over 150 separate times among vertebrates, including ...