Sally-light-foot crab
  A species of Grapsus   Scientific name : Grapsus albolineatus  Genus :   Grapsus    
  Sally-light-foot crab, A species of Grapsus 
  Botanical name: Grapsus albolineatus 
  Genus:  Grapsus 
  Content 
 Description
  Photo By Palmfly , used under CC-BY-SA-3.0 /Cropped and compressed from original  Description
 Its carapace, or upper shell, is flat, circular, and rough with arched lateral margins, and may be up to 37 mm in length. Its chelae, or claws, are short, small, and flattened. Its pereiopods, or legs, are long with a tapered end. The margin of the inferior extremity of its last pair of legs is serrate. Males have bigger claws than females. This species is red, blue, or green in color. Its legs are the same color and have irregular dark-brown mottling. 
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 Scientific Classification
 Phylum 
  Arthropods   Class 
  Malacostracans   Order 
  Crabs   Family 
  Marsh crabs   Genus 
  Grapsus   Species 
  Sally-light-foot crab