Crabs Guard Coral

Sorry I’ve been absent lately; preparing for Antarctica, inviting Doctors Without Borders to visit Kenyon, and setting up Avatar to show for Bio Sci Fi. But here’s a good one you may have missed–guard crabs for coral. These tiny crabs can protect coral reef from getting gobbled up by starfish the size of a trash can. Mutualism at work–yet another way evolution promotes cooperation as much as competition.