Adult green sea turtle (Chelonia mydas agassizii) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

galapagos islands ecuador underwater marine life ocean wildlife swimming tropical waters snorkeling biodiversity aquatic ecosystem conservation oceanography coral reefs marine fauna sea vegetation natural beauty ecotourism scuba diving endangered species seaweed coastal environment ocean currents tranquil waters marine biodiversity underwater exploration oceanic landscape aquatic adventure nature exotic ecosystems sea creatures underwater habitat marine adventures ocean exploration animal behavior marine sanctuary ecological balance adult green sea turtle chelonia mydas agassizii galapagos island