Grapsus adscensionis , commonly known as The Red Rock Crab, lives near the water line on rocks. This crab is very active on land and takes refuge in the sea when there is danger . Grapsus adscensionis is an algae grazer.
Grapsus adscensionis is a common intertidal species in the eastern Atlantic.
Cancer adscensionis Osbeck, 1765
Grapsus adscencionis (Osbeck, 1765) (lapsus calami)
Grapsus pictus var. ocellatus Studer, 1883
Grapsus webbi H. Milne Edwards, 1853