Some sharks are filter-feeding planktivores, such as the whale shark and basking shark, which are among the largest fish ever lived. Sharks are caught by humans for shark meat or shark …

Dec 21, 2025 · Shark, any of numerous species of cartilaginous fishes that make up the order Selachii (class Chondrichthyes). Most species have a tough skin that is dull gray in color and …

Scientists are still trying to figure out how long sharks live and have only studied the ages of a fraction of shark species. Most notable is the Greenland shark, Earth’s longest-lived ...

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Unlike bony fishes, which have one gill slit on each side of their bodies, most sharks have five slits on both sides that open individually (and some shark species have six or seven). After water …

Jan 21, 2025 · Different shark species swallow their food whole, tear it apart with razor-sharp teeth, or grind it down with flat chompers. You're more likely to be killed by lightning than by a …

There are over 400 shark species worldwide. Learn how WWF protects sharks from threats like overfishing and habitat loss.

An annotated and illustrated catalogue of shark species known to date. by Leonard J.V. Compagno, Ph.D., the world’s foremost expert on sharks and Director of our Board of Trustees.

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Jun 11, 2025 · The smallest shark is the deepwater dogfish (Etmopterus perryi) at only 8 inches and the largest is the whale shark (Rhincodon typus), which, at 13 meters, (42 feet), is the …