Things Keep Evolving into Crabs in a Process Called Carcinization

If you dislike multi-legged creeping life creatures that scurry around and have claws, science has some terrible news for you. Everything in nature aspires to be a crab. In fact, carcinization is a term used to describe how much nature wants things to resemble crabs. That is the ongoing process through which a creature that does not resemble a crab transforms into one.

The process does appear to influence organisms who began life in the general area that was "crab-like," so we need not worry that one day we will transform into crabs. Which means that initially non-crabbed shaped crustaceans, such as those that resemble lobsters or hermit crabs, do evolve into crabs.

Hermit crabs, which have a very flimsy exoskeleton and must use the shells of other marine life, had a pretty rapid development to become king crabs, which do have a solid skeleton. Other examples include "false" crabs such hairy stone crabs and porcelain crabs. However, their convergent development into crabs has occurred independently and is a very unique case.