No
bigger than a thumb, a sand crab spends most of its time buried in
shifting sand. Well camouflaged by its gray shell, a sand crab keeps its
balance in the ever-moving sand with the help of a heavily armored,
curved body and pointy legs. To stay put in the sand, a crab burrows
quickly and often. While most crabs move in any direction—forward,
backward and sideways—a sand crab moves only backward. And a sand crab
has no claws on its first pair of legs—another unusual feature for a
crab.
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