Tourist and tour guide swimming with a whale shark (Rhincodon typus) in Honda Bay, Palawan, The Philippines, Southeast Asia, Asia

A dawn Zodiac tour of Boatswain Bird Island just off Ascension Island in the southern tropical Atlantic Ocean, South Atlantic Ocean

Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) with snorkeler in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

West Indian manatee (Trichechus manatus), with snorkelers near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of hard and soft corals, as well as tropical reef fish at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

Tulum is the site of a Pre-Columbian Maya walled city serving as a major port for Cobá, Daily tour buses bring a constant stream of visitors to the site,

Tulum is the site of a Pre-Columbian Maya walled city serving as a major port for Cobá, Daily tour buses bring a constant stream of visitors to the site,

Tour boat, boat trip, Cala d'Hort, Ibiza, Pine Islands, Balearic Islands, Spain, Europe

Tour boat, boat trip, Cala d'Hort, Ibiza, Pine Islands, Balearic Islands, Spain, Europe

Excursion boats anchoring off Stipanska Island, Hvar Island at back, Central Dalmatia, Adriatic Coast, Croatia, Europe

Snorkeler under the glass floor in a room of bora bora nui resort and spa, Bora bora island society islands french polynesia south pacific

Split View of a teenage girl snorkeling in a bikini with a tour boat on the surface of the water above, Country of Aruba

Snorkelers getting ready to enter the water from a snorkelling tour boat operated out of Maui, Hawaii. They are located next to the backwall of Molokini Crater which is a volcanic tuff cone, Maui, Hawaii, United States of America