An Ascension Island Crab (Grapsus adscensionis) on a rock on a beach on Ascension Island
Contributor:Robert Kennett / Alamy Stock Photo
File size:35.9 MB (2.1 MB Compressed download)
Releases:Model - no | Property - noDo I need a release?
Dimensions:4337 x 2892 px | 36.7 x 24.5 cm | 14.5 x 9.6 inches | 300dpi
Date taken:30 May 2015
Location:Dead Man's Beach, Georgetown, Ascension Island, South Atlantic
Grapsus grapsus is one of the most common crabs along the western coast of the Americas, but is replaced in the eastern Atlantic Ocean (Ascension Island and West Africa) by its congener Grapsus adscensionis. Young Grapsus crabs are black or dark brown in colour and are camouflaged well on the black lava coasts of volcanic islands. Adults are quite variable in colour; some are muted brownish-red, some mottled or spotted brown, pink,or yellow. This crab lives amongst the rocks at the often turbulent, windy shore, just above the limit of the sea spray. It feeds on algae primarily, sometimes sampling other plant matter and dead animals. It is a quick-moving and agile crab which can jump considerable distances and it is therefore very hard to catch. It has been nicknamed “Sally lightfoot” by sailors.