Mola Mola, also known as the sunfish, is one of the heaviest bony fish in the ocean. They can weigh up to 5,000 pounds and grow up to 10 feet long. Scuba divers often encounter them in warm waters, especially in coastal areas like Hawaii and Indonesia. Mola Mola feed primarily on jellyfish, swimming gracefully and almost vertically. Their unique shape and behavior make them a fascinating sight for divers exploring the underwater world.