and new species are described every year. The difference between a shark and other fish: Unlike bony fish, sharks, rays, skates, and chimaeras are cartilaginous fish, meaning their skeletons are ...
Modern-day chimaeras are much less diverse and typically live in the deep ocean ... Fossil teeth show that the asteroid strike at the end of the Cretaceous killed off many of the largest species of ...
One of only three filter-feeding shark species, basking sharks eat tiny organisms called zooplankton. Swimming with their three-foot-wide mouths agape allows them to take in water and filter out ...