We've been accidentally giving them a free ride around the ocean. Now it's time to think with our appetites. Image credit: JDScuba / Shutterstock.com If you live on The Internet, you’ve likely heard about carcinization: a kind of convergent evolution that’s seen a surprisingly large number of living things evolve crab-like bodies. So, are crabs peak performance? Given the meteoric rise of a species currently invading the oceans, they just might be. Enter: the European green crab, Carcinus maenas. They are a staple feature across parts of the Atlantic Ocean and Baltic Sea, but have since spread from their native...