A crab does not beget a bird. (African) A lame crab walks straight. (Afghani) Remove the claws of even a boiled crab. (Korean) The crab that walks too far falls into the pot. (Haitian) ‘Walk straight, my son’, said the old crab to the young...

Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (Greek: brachy = short, ura = tail), or where the reduced abdomen is entirely hidden under the thorax. They are generally covered with a thick...