Alex Mustard / Diver swimming over the stern gun turret of the 330ft long Russian frigate 356, the "MV Keith Tibbetts". The ship was built in 1984 and sunk in 1996. Buccaneer Reef, Cayman Brac, Cayman Islands. Carib...

Franco Banfi / Scuba diver and yellow sponges (Aplysina cavernicola) on Brioni Steamship wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean. Model released.

Michael Pitts,Michael Pitts / Divers on the wreck of the tugboat, 'Tienstin'. Abu Galawa, Red Sea, July 2010

Michele Westmorland / Split level view of scuba diver with PR Aquanauts boat in Grenada, Caribbean. May 2009. Property released and diver model released.

Franco Banfi / Scouting the river on a small boat driven by an electric motor ready to dive, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Scouting the river on a small boat driven by an electric motor in search of Anacondas, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Magnus Lundgren / Wild Wonders of China / A dive boat in Sai Kung archipelago, Hong Kong, China. June, 2016.

David Fleetham / Divers step off a dive boat into the Pacific Ocean out from Ukumehame, Maui, Hawaii. March 2014. Model released.

Franco Banfi / Blacktip reef shark (Carcharhinus melanopterus) under the Zodiac, Aldabra Atoll, Natural World Heritage Site, Seychelles, Indian Ocean.

SCOTLAND: The Big Picture / Three people in dive boat, with divers getting ready to go in water, Lamlash Bay, Isle of Arran, South Arran Marine Protected Area, Scotland, UK, August 2016.

SCOTLAND: The Big Picture / Two divers undertaking their final checks on dive boat, Lamlash Bay, Isle of Arran, South Arran Marine Protected Area, Scotland, UK, August 2016.

SCOTLAND: The Big Picture / Diver undertaking a backward roll off side of boat, Lamlash Bay, Isle of Arran, South Arran Marine Protected Area, Scotland, UK, August 2016.