Red Rock Crab Sally Lightfoot Crab

The adult G. grapsus have a bright-red carapace in contrast to the juvenile’s black or greenish carapace which occasionally may be speckled with cream-colored dots.
It predominantly feeds on algae using their spoon shaped tipped pinchers. G. grapsus runs with extraordinary speed and agility along the upright sides of rocks and has the uncanny ability to hide away in crevices to escape predation by rapacious birds.