In evolutionary biology, carcinisation (or carcinization)'s a hypothesised process whereby a crustacean evolves into a crab-like form from a non-crab-like form. The term was introduced by L. A. Borradaile, who described it as "one of the many attempts of Nature to evolve a crab." Carcinisation's believed to have occurred independently in at least five groups of decapod crustaceans, most notably king crabs,which most scientists believe evolved from hermit crab ancestors (there's still some debate… (More on Carcinisation)