Photographer and diver Miguel Pereira captured this insane footage of a massive Mola mola off the coast of Portugal at Ilha de Santa Maria, Açores in 2013.
The video, uploaded to YouTube by ViralHog last year, shows the fish, also called an ocean sunfish, swimming slowly amongst the divers, seemingly oblivious as the divers snap away with their cameras. Pereira and his crew of photographers look puny as they swim alongside the massive fish.
Mola mola sunfish are the largest bony fish in the world and get very heavy, with an average weight between 545 and 2,200 pounds. They also grow fast, with Wikipedia reporting that a mola mola at the Monterey Bay Aquarium in California grew from 57 to 880 pounds in just 18 months and reached a height of 5.9 feet.
Pereira is quoted in the video description as saying that prior to this dive, his underwater housing flooded and ruined his camera, but he had a GoPro that captured the footage of this spectacular and interesting fish.
This is some seriously interesting footage of a fish that is not often seen.