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 rocky shore marine life biodiversity low tide marine invertebrates wildlife ecology crustacean ocean nature algal growth ecosystem coastal habitat south america animal behavior intertidal ecology galapagos archipelago crabs scavenger vibrant colors fauna ocean habitat coastal ecosystem sandy beach natural environment wildlife conservation aquatic life biodiversity hotspot crab anatomy exploring habitat rocky coastline coastal foraging marine conservation sea creatures tidal pools crustacean habitat sea life marine species crab locomotion ecological significance