TIL that the crab-like form is so effective, at least five groups of crustaceans have independently evolved into that shape, in a process called carcinisation.

http://en.wikipedia.org/wiki/Carcinisation



Submitted December 31, 2014 at 10:32AM by monkeysky http://www.reddit.com/r/todayilearned/comments/2qw3jr/til_that_the_crablike_form_is_so_effective_at/

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