Sally lightfoot crab (Grapsus grapsus) in the littoral of the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

grapus grapsus galapagos islands intertidal zone coastal habitat ecuador marine life rocky shore vibrant colors crab crustacean wildlife animal red crab sea life biodiversity environment shore ocean natural habitat survival ecology tidal pool ecosystem volcanic rock saltwater crustaceans tropical snorkeling fauna nature coastal ecosystem galapagos underwater marine biodiversity conservation endangered species ecological balance intertidal habitat oceanic islands animal behavior wildlife preservation coastal areas red coloration rocky coastline marine environment