It's a "sea monstah."

The Japan ArchivesOutcast Sport Fishing crew was chartering off the coast of Hilton Head Island, South Carolina when they came across a massive sea monster: a 16-foot manta ray, which is basically a giant swimming bird.

After cruising alongside the giant to snap some photos, the manta ray eventually swam off, completely unfazed by the crowd of alien onlookers.

Manta rays can wing span can reach a length of 23 feet, so this was by no means the largest manta ray out there, but still a massive sea creature.