Dive Center at Cabo Pulmo, Cabo Pulmo National Park, Baja California Sur, Mexico

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

A module of a space station reproduction in a diving basin, backup divers carefully examine the space station, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

A module of a space station reproduction in a diving basin, backup divers carefully examine the space station, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia, Germany, Europe

Backup divers and astronauts practicing with a space station module reproduction in a diving basin, underwater photographers are documenting the training session, European Space Agency, ESA, European Astronaut Center, EAC, Cologne, North Rhine-Westphalia,

Diving flag over the scuba diving center at the Sun Breeze Hotel, San Pedro, Ambergris Cay Island, Belize, Central America, Caribbean

Humphead wrasse (Cheilinus undulatus), Small Brother dive site, Brother Islands, Egypt, Red Sea, Africa

Overgrown shipwreck of the Numidia, sunken 20.07.1901, Vermillion seabass or (Cephalopholis miniata), sun, backlight, Red Sea, Big Brother Island, Brother Islands, El Alkhawein, Egypt, Africa

Overgrown shipwreck of the Numidia, sunken 20.07.1901, Red Sea, Big Brother Island, Brother Islands, El Alkhawein, Egypt, Africa

Hemprichs tree coral (Dendronephthya hemprichi), red, on steep wall. Dive site Small Brother, Brother Islands, Egypt, Red Sea, Africa

Ireland, North, Belfast, Titanic Quarter, Visitor centre designed by Civic Arts & Eric R Kuhne, with statue of diving woman in foreground.

Diving with Stollis Diving Center, Tamariu, Costa Brava, Mediterranean Sea, Spain

Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Scuba diver exit the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Scuba diver under ice in a halocline cloud, a subtype of chemocline caused by a strong, vertical salinity gradient within a body of water. Arctic circle Dive Center, White Sea, Karelia, northern Russia

Person who provide contact with the divers inside the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Scuba diver under ice walking upside down, exercise to practice orientation, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Sea Angel (Clione limacina), Arctic circle Dive Center, White Sea, Karelia, northern Russia

Beluga whales, (Delphinapterus leucas) swimming under ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Couple of Sea Angel, Clione limacina, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Surface tender seen through the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Scuba diver under ice walking upside down, exercise to practice orientation, Arctic circle Dive Center, White Sea, Karelia, northern Russia