Sun trickles and reflects of the back of a sea turtle as it swims above a coral and sand reef

scuba diving snorkeling underwater great barrier reef coral bleaching travel tourism tourist adventure nature ecosystem underwater camera aquatic sport scuba diver point of view saltwater fish aquatic organism tropical climate animal wildlife sea turtle sea life hawksbill turtle tropical fish swimming travel destinations great barrier reef marine park marine reserve 4k resolution sunlight feeding undersea animal water coral cnidarian seascape island environmental conservation climate change endangered species biodiversity lagoon free diving wildlife reserve