Put on your Ear Guards, the Department of Incredible Insects just learned about an awesome and terrifying discovery recently made in China. This monstrous creature is a member of the Megaloptera order and may be the world’s largest aquatic insect.

The specimen seen here was discovered in a mountain in Chengdu in China’s Sichuan province. Its wingspan measures 8.3 inches (21 cm) and it features a savage pair of mandibles.

Bec Crew from Scientific American explains more:

"Just as this new find is so far pretty mysterious, members of Megaloptera are also fairly poorly known. As larvae, they spend all of their time in the water, only venturing out once it’s time to pupate and become adults. While they’re usually found in clean, clear streams, rivers, swamps, ponds and lakes, they’re also perfectly capable of sustaining themselves in muddy and polluted water, which makes them extra hard to spot."

Visit io9 to learn more about this fascinating and nightmarish discovery. And please don’t go to sleep without those Ear Guards.