Alex Mustard / A fisherman swims down to touch the statue of Christ Of The Abyss (Cristo degli abissi) for good fortune, in the Marine Protected Area of Portofino (Area Marina Protetta, Portofino), Liguria, Italy. M...

Michele Westmorland / Underwater Sculpture Gallery off Molinere Point, created by Jason de Caires Taylor. Colonised by sea life, Grenada, West-Indies, Caribbean, May 2009. No release.

Doug Perrine / Shimmering heat waves distort the image of diver as he samples erupting pillow lava at ocean entry of Kilauea Volcano, Hawaii Island.

Doug Perrine / Diver shaping erupting pillow lava by hand to form underwater lava sculptures at ocean entry from Kilauea Volcano, Hawaii.

Doug Perrine / Diver sampling red hot pillow lava at underwater eruption of Kilauea Volcano, Hawaii.

David Fleetham / Split-level image of swimming pool and ship / restaurant named The S/V Mnuw (Sea Hawk) at the Manta Ray Bay Hotel on the island of Yap, Micronesia. September 2007.

Alex Mustard / Statue of a mermaid 'Amphitrite', placed underwater on a coral reef as an attraction for divers. George Town, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Olga Kamenskaya / Painting of Baikal seal on Baikal ice, painted underwater, Lake Baikal, Siberia, Russia. March.

Alex Mustard / Underwater photographer Alex Mustard taking a self-portrait with a friendly young grey seal (Halichoerus grypus). Farne Islands, Northumberland, England, British Isles. North Sea. Model released.

Alex Mustard / The Guardian Of The Reef Statue, with diver, Lighthouse Point. Grand Cayman, Cayman Islands, Caribbean Sea.

Alex Mustard / The statue of Christ Of The Abyss (Cristo degli abissi) in the Marine Protected Area of Portofino (Area Marina Protetta, Portofino), Liguria, Italy. Mediterranean Sea. This was the world's first under...

Claudio Contreras / Submarine statues at the MUSA Cancun Underwater Museum, a conservation project to promote the growth of coral. Isla Mujeres, Cancun National Park, Caribbean Sea, Mexico.

Claudio Contreras / Cottonwick (Haemulon melanurum) fish among submarine statues at the MUSA Cancun Underwater Museum, a conservation project to promote the growth of coral. Isla Mujeres, Cancun National Park, Caribbean...

Michele Westmorland / Underwater Sculpture Gallery off Molinere Point, created by Jason de Caires Taylor. Colonised by sea life. Grenada, West-Indies, Caribbean, May 2009. No release.

Michele Westmorland / Underwater Sculpture Gallery off Molinere Point, created by Jason de Caires Taylor. Colonised by sea life, Grenada, West-Indies, Caribbean, May 2009. No release.

Pete Oxford / Names carved into coral head, Banda Sea, Indonesia

Tony Wu / Self portrait of photographer Tony Wu underwater, face to face with friendly Australian sea lion (Neophoca cinerea), Carnac island, Western Australia. Indian Ocean.

Franco Banfi / Ancient Roman statue of Antonia minor, member of Julio-Claudian dynasty, daughter of Marcus Anthony and sister of emperor Augustus, located in submerged Nymphaeum of Emperor Claudius. Marine Protected...

Franco Banfi / Ancient Roman statue of Dionysus with ivy crown, located in submerged Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhenian sea.

Franco Banfi / Ancient Roman statue of Antonia minor, member of Julio-Claudian dynasty, daughter of Marcus Anthony and sister of emperor Augustus, located in submerged Nymphaeum of Emperor Claudius. Marine Protected...

Franco Banfi / Statue depicting companion of Ulysses, perhaps Baio, located in submerged Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhenian sea. statue encrusted with sealife

Franco Banfi / Ancient Roman statue of the god of intoxication and happiness Dionysus, located in submerged Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhenian sea.

Franco Banfi / Scuba diver near ancient Roman Statue of Antonia minor, member of Julio-Claudian dynasty, daughter of Marcus Anthony and sister of emperor Augustus, in submerged Nymphaeum of Emperor Claudius. Marine...

Franco Banfi / Ancient Roman statue of Antonia minor, member of Julio-Claudian dynasty, daughter of Marcus Anthony and sister of emperor Augustus, located in submerged Nymphaeum of Emperor Claudius. Marine Protect...

Franco Banfi / Ancient Roman statue of Ulysses with cup of wine, located in submerged Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhenian sea.

Franco Banfi / Ancient Roman statue depicting companion of Ulysses, perhaps Baio, located in submerged Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhenian sea. Encrusted with barn...

Henley Spiers / Statue of Virgin Mary placed on seabed at dive site to deter destructive fishing practices by Catholic fishermen, Chocolate Island, Cebu, Philippines, Pacific Ocean. June, 2019.

Henley Spiers / Graphic image of jellyfish with long, trailing tentacles, Santander, Cebu, Philippines, Pacific Ocean.