Sharks, with their streamlined bodies and powerful jaws, have patrolled the oceans for over 450 million years, making them one of the planet's oldest living vertebrate groups. Unlike their bony fish cousins, their skeletons are made of cartilage, giving them a unique flexibility and agility. They possess a remarkable array of senses, including electroreception to detect electrical fields and an exceptional sense of smell that allows them to track prey from vast distances. These fascinating creatures play a vital role in maintaining healthy marine ecosystems, acting as apex predators that keep prey populations in check and promote biodiversity.