4382 x 2921 px | 37,1 x 24,7 cm | 14,6 x 9,7 inches | 300dpi
Data acquisizione:
26 maggio 2015
Ubicazione:
Dead Man's Beach, Georgetown, Ascension Island, South Atlantic
Altre informazioni:
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.
