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 ...

Sharks were thought to have evolved with a cartilage-based skeleton before other types of fish formed a boney structure, but a new discovery turns that on its head. An ancient 'armoured fish' skull ...

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 ...

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 ...

The emergence of jawed vertebrates (gnathostomes) from jawless vertebrates was accompanied by major morphological and physiological innovations, such as hinged jaws, paired fins and ...

Overview: Shark cartilage refers to the cartilage from certain ocean sharks, including the dogfish and hammerhead sharks. It contains many different chemicals and substances, including proteins, fats, ...

Sharks' non-bony skeletons were thought to be the template before bony internal skeletons evolved, but a new fossil discovery suggests otherwise. Sharks' non-bony skeletons were thought to be the ...