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Tourist turned viral photo subject Mark Pierrot's recent trip to Australia's Christmas Island gave him the chance to hang out with some of the locals, including this utterly gigantic coconut crab—the largest known land arthropod on Earth. The tropical island is home to more than a million of these huge crabs, in case you're wondering where not to go on vacation.

Monster crab #christmasisland #nature #jungle #australia #wtf

A post shared by Mark Pierrot Ci (@markci) on

Coconut crabs can grow up to 16 inches, with a leg span of three feet, and weigh up to nine pounds, and will now be the subject of nightmares for countless readers everywhere. You're welcome!