Sea lions are playful marine mammals found along the coasts of the northern hemisphere. They are known for their acrobatics and intelligence, making them fun to watch while diving. Sea lions can dive up to 600 feet deep in search of food, primarily fish and squid. They have specialized adaptations, like external ear flaps and the ability to rotate their hind flippers, which help them navigate efficiently in the water. Scuba divers often encounter them in their natural habitats, providing memorable experiences.