Fossil shark tooth (size over 9 cm or 3.5 inches) with crown, shoulder, root and root lobe A collection of Cretaceous shark teeth The oldest total-group chondrichthyans, known as acanthodians or "spiny …

Nov 19, 2024 · Sharks are cartilaginous fish with diverse shapes, sizes, and diets, inhabiting all oceans and playing crucial roles in marine ecosystems.

Facts about many sharks from the eight orders of sharks from the Shark Research Institute (SRI). SRI conducts and sponsors rigorous, peer-reviewed field research about sharks and uses science-based …

Sharks can rouse fear and awe like no other creature in the sea. Find out about the world's biggest and fastest sharks, how sharks reproduce, and how some species are at risk of extinction.

There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous fish, a single image comes to mind: a large, sharp-toothed and scary beast. …

Jun 11, 2025 · Sharks are ancient, diverse predators with over 500 species. They're vital to ocean health—but slow to reproduce and threatened by overfishing.

May 16, 2024 · Sharks are often characterised as vicious killers, but in reality, they’re a diverse and endangered group of creatures that add tremendous value to marine ecosystems.

Learn about the different types of sharks - where and how long they live, what they eat, are they fish or mammals, interesting facts, pictures, and more.

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

Jan 21, 2025 · Discover interesting facts about where sharks live, how big they can get, and how likely it is to get bitten by one.