While swimming near Indonesia's Komodo Island, National Geographic reports that a diver came face-to-face with a famously elusive ocean creature—a megamouth shark—and managed to capture it on film.

Discovered in 1976 off the coast of Hawaii, megamouth sharks have (surprise!) a very large mouth and a snout-shaped head, and can grow up to 17 feet in length. They’re filter feeders, and they alternate between deep and shallow water—but aside from details like these, researchers don’t know a lot about the mysterious animal, as only around 100 sightings have ever been reported.

Watch the megamouth shark swim below:

[h/t National Geographic]