Ocean sunfishes are the heaviest living bony fish in the world. They can generally grow up to 10 feet in length — although the one found in the Azores was longer — and apparently weigh more than 6,000 pounds. Most of the time, they’re floating around in the deep ocean, but they do come up to the surface on occasion, where they float on their sides to warm up and let the birds eat the parasites off them. The birds or Mark Healey, who ever gets there first.