The study, published in PLOS Biology, examined the skeletons of modern-day cartilaginous jawed fishes, like skates and sharks, along with jawless lampreys and hagfish. The jawed skates and sharks have ...

Though the new paper presents the first evidence of a shark making a sound, recent research has revealed that two other types of cartilaginous fish, rays and skates, also make noise. Scientists ...

(Mainichi/Kimitaka Hirayama) MUKAWA, Hokkaido -- A fossilized tooth of a cartilaginous fish found in Japan's northernmost prefecture Hokkaido in 2013 is of a newly discovered species, researchers ...