Every year, swarms of Christmas Island red crabs make their annual trek to the sea. Tied to the lunar calendar, the massive migration usually begins during the island's wet season in October or November, when millions of crustaceans travel from the rain forest to seaside breeding grounds to mate. ➡ Subscribe: bit.ly/NatGeoWILDSubscribe About Nat Geo Wild: Welcome to a place so wild, anything can happen. Nat Geo Wild is the network all about animals from National Geographic, where every story is an adventure and your imagination is allowed to run wild. Get More Nat Geo Wild: Official Site: bit.ly/NatGeoWILD Facebook: bit.ly/NGWFacebook Twitter: bit.ly/NGWTwitter Instagram: bit.ly/NGWInstagram Learn more about the Christmas Island Red Crab. www.nationalgeographic.com/animals/invertebrates/c/christmas-island-red-crab/ Millions of Red Crabs Swarm Christmas Island Every Year | Nat Geo Wild youtu.be/036-38HfeXY Nat Geo Wild www.youtube.com/user/NatGeoWild