crab wiki:
>For other uses, see Crab (disambiguation). DromiaceaRaninoidaHeterotremataThoracotremata The term crab is often applied to several different groups of short (nose to tail) decapods with thick exoskeletons, but only members of the Brachyura are true crabs; other taxa, such as hermit crabs, porcelain crabs, king crabs, and horseshoe crabs are, despite superficial similarities, not crabs at all. Hermit crabs, king crabs and porcelain crabs belong to the Anomala and can be distinguished from true crabs by counting the legs - in Anomala, the last pair of pereiopods (walking legs) is hidden inside the carapace and so only four pairs are visible (counting the claws), whereas uninjured true crabs always have five visible pairs.
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doodle wiki:
e first appeared in the early seventeenth century to mean a fool or simpleton, and is thought to derive from the Low German "dudeltopf", meaning "fool" or "simpleton". This in turn resulted in the early eighteenth century verb "to doodle", meaning "to swindle or to make a fool of". The most common modern meaning, an aimless drawing while a person's attention is otherwise occupied, emerged in the 1930s either from this meaning or from the verb "to dawdle", which since the seventeenth century has had the meaning of wasting time or being lazy.
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