British tourist Penny Bielich and her diving group encountered an extremely rare megamouth shark on the Gili Lawa Laut off Komodo Island, Indonesia.
The 26-second clip show the approximately 15-foot shark as it passes overhead. Although the sharks are not considered a threatened species, encounters with megamouths, a species that typically lives at depths of up to 1,500 feet, are exceptionally rare. Roughly 100 of this species have ever been encountered according to the International Union for Conservation of Nature.
Despite their enormous size –they routinely grow to 18 feet or longer — they pose no threats to humans. Like other megasharks like whale and basking sharks, megamouths are filter feeders that eat plankton, shrimp and other small fish.