On the plus side, that means it makes a great comic photo prop. Here, blogger Angelo O'Connor Villagomez plays Edward Crabhands.
Native to a wide range of Pacific islands, the crabs used to be plentiful. Sadly, they're one of those creatures that humans have eaten into being an endangered species. These crabs can live for up to 60 years and (get this) they're not even the largest species of crab in the world. That would be the Japanese spider crab.
Via Craig McClain
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.