Ocypode quadrata
Oocypode quadrata, also known as ghost crabs, are small crabs (up to around 50mm) with square-shaped sand-coloured shells. They are commonly found in the inter-tidal zones. They breathe through moistened gills, that are wet with seawater, usually by taking water from moist sand or by running into the surf and letting the waves wash over them. Therefore, the inter-tidal zone is suitable for their survival. Ghost crabs also have the ability to change their colour to match their surroundings by adjusting the concentration and dispersal of pigments within their chromatophores. This enables them to escape from their predators.
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