Roca Partida islet in Mexican Pacific surrounded by dive boats, aerial arc

roca partida split rock islet revillagigedo islands mexican galapagos unesco mexico colima mexican biosphere reserve natural protected area gulf of california volcanic natural world heritage site mexican pacific dive site sea stack aerial dive boats uninhabited island erosion marine life marine ecosystem national park small island remote marine environment vertical walls diving archipelago ocean sea boats dive boat revillagigedo pacific unique ecosystem biosphere reserve marine reserve most beautiful dive site guano 50fps scenic seascape no people nobody