The world's largest species of shark is the whale shark (Rhincodon typus). Whale sharks can reach lengths of up to 60 feet (18 meters) or more, making them the largest fish species alive today. These gentle giants are filter feeders, primarily consuming plankton, small fish, and other microscopic organisms. They are found in warm oceans and often gather in certain locations, making them popular among divers and marine enthusiasts. Despite their enormous size, whale sharks pose no threat to humans. Their unique spotted pattern and docile nature make them fascinating creatures in the marine ecosystem.