Crabs are just water borne insects. Insects have 8 legs. 2 of the crabs legs have evolved to be swimmers, so a blue crab has 6 walking legs and 2 swimmers. There are serveral land insects that resemble crabs and lobsters. There are crabs that live mostly on the land. Cuba was full of very large green crabs that lived on the land and would wlak up to people and pinch them with their claws...nasty things...
Yeah I got the "bug" real bad too..pun intended...



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