Quote Originally Posted by Wraith View Post
Apparently it's something that has happened 5 or 6 times throughout history - nature really, really likes crabs and keeps trying to get things to evolve into them from several different sources, so much so that the process has its own name.
It should be noted that it is specific, as far as we know currently, to crustaceans. Lemurs are not evolving into crablike things. Carcinisation is when a crustacean that did not appear as a "crab" evolves into something that has the appearance of a "crab".