Ghost crab
Ghost crabs, also called sand crabs, are crabs of the genus Ocypode, common shore crabs in many countries. In the eastern United States, Ocypode quadrata is frequently seen scurrying along beaches between sunset and dawn. These crabs are called ghosts because of their ability to disappear from sight almost instantly, scuttling at speeds up to 10 miles per hour, while making sharp directional changes. These creatures have two black eyes, with sharp 360° vision which they use to see flying insects and catch them in mid air. The ghost crab, however, cannot see directly up, so it must burrow into the ground to prevent birds from catching it.
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