it was probably one of the coolest things I’ve ever seen,” Dr. Santon said. In a series of dives over the next year, he and his team filmed more than 200 cuttlefish hunts, from crab-eye view.

Christmas Island, an Australian island in the Indian Ocean, is home to one of the world's coolest natural wonders: the Christmas Island red crab migration. Every year, the island's ~50 million ...