Sharks are fascinating creatures that live in oceans around the world. They belong to a group of fish known as chondrichthyans, which have skeletons made of cartilage instead of bone. Sharks come in many shapes and sizes, from the small dwarf lanternshark to the massive whale shark. They are known for their sharp teeth and keen sense of smell, which help them hunt for food. Despite their fearsome reputation, most sharks are not dangerous to humans. In fact, they play a crucial role in maintaining the health of marine ecosystems by keeping fish populations in balance. Protecting sharks is important for the future of our oceans.