#swimming_crab  marine crab with some legs flattened and fringed for swimming
  supertype:  crab  decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
  member of:  family_Portunidae
  subtype:  English_lady_crab__Portunus_puber  crab of the English coasts
  subtype:  American_lady_crab__lady_crab__calico_crab__Ovalipes_ocellatus  brightly spotted crab of sandy beaches of the United States Atlantic coast
  subtype:  Callinectes_sapidus__blue_crab  bluish edible crab of Atlantic and Gulf coasts of North America

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