What is a shark?

Sharks are a group of fish known for their cartilaginous skeletons, streamlined bodies, and role as apex predators in marine ecosystems. There are over 500 species of sharks, ranging in size from a few inches to over 40 feet long. Sharks have been around for more than 400 million years and play a crucial role in maintaining the health of ocean habitats by keeping populations of other marine species in balance. Despite their reputation, most sharks are not dangerous to humans and are essential for a healthy ocean.