Alex Mustard / California sea lion (Zalophus californianus) adult female swimming through sunbeams in an underwater cave. Los Isotes, La Paz, Mexico. Sea of Cortez, East Pacific Ocean.

Alex Mustard / A school of lesser devil rays (Mobula hypostoma) flying through sunbeams as they feed. Isla Mujeres, Quintana Roo, Yucatan Peninsula, Mexico. Caribbean Sea.

Kirkendall-Spring / Sunbeams through Coastal Redwood trees (Sequoia sempervirens), Muir Woods NP, California, USA

Alex Mustard / Aggregation of moon jellyfish (Aurelia aurita) with sunbeams, below the surface of the ocean. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Ingo Arndt / Sunbeams over Lago Sarmiento. Torres del Paine, Patagonia, Chile. December 2016.

Heather Angel / Sunbeams shining through Bamboo (Bambusidae) leaves. Shunan Zhuhai National Park, Sichuan Province, China.

Erlend Haarberg / Sunbeams from dark clouds above Lake Virihaure in Padjelanta National Park, Laponia World Heritage Site, Swedish Lapland, Sweden.

Alex Mustard / Grey seal (Haichaoerus grypus) swimming below surface with sunbeams. Lundy Island, Devon, UK. Bristol Channel, August.

Alex Mustard / Sunbeams over a Kelp / Oarweed forest (Laminaria hyperborea). Farne Islands, Northumberland, UK, North Sea, August

Alex Mustard / Sunbeams below the surface of the sea, Guadalupe Island, Baja California, Mexico. East Pacific Ocean

Alex Mustard / Seafan (Melithaea sp.) grows below an overhang in the shade of sunbeams. Daram Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea.

Enrique Lopez-Tapia / Storm in the Lasta mountains, with sunbeams shining from the clouds, Lalibela. Ethiopia, November 2014

Enrique Lopez-Tapia / Storm in the Lasta mountains, with sunbeams shining from the clouds, Lalibela. Ethiopia, November 2014

Enrique Lopez-Tapia / Storm in the Lasta mountains, with sunbeams shining from the clouds, Lalibela. Ethiopia, November 2014

Chris Mattison / Rainclouds with sunbeams shining through, Anza-Borrego Desert, Southern California, USA, May.

Erlend Haarberg / Aerial view of mountain landscape silhouetted in sunbeams on a cloudy day. Looking from above Borgvaag towards the south west. Vestvaagoey, Lofoten, Nordland, Norway. October 2012.

Klaus Echle / Sunbeams shining through on to a misty Black Forest landscape, Baden-Wurttemberg, Germany. July.

Alex Mustard / Shafts of light shine down into the darkness of cavern within coral reef. Jackfish Alley, Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Alex Mustard / Shafts of light shine down into the darkness of cavern within coral reef, with Soldierfish (Holocentridae) and Goatfish ( Mullidae) Sha'ab Claudia, Fury Shoal, Egypt. Red Sea.

Michel Roggo / Light rays shining throught the Cenote Tajma-Ha, Quintana Roo, Yucatan Peninsula, Mexico, February. Taken for the Freshwater Project.

Michel Roggo / Underwater landscape of Cenote Tajma-Ha, Quintana Roo, Yucatán Peninsula, Mexico, February 2014. Taken for the Freshwater Project.

Michel Roggo / Underwater landscape of the Clearwater river, outside Clearwater cave. Tributary of the Sungai Melinau river, Gunung Mulu National Park, Sarawak, Borneo, Malyasia, March 2012. Taken for the Freshwater...

Michel Roggo / Small tributary of the Sungai Melinau river, Gunung Mulu National Park, Sarawak, Borneo, Malyasia, March 2012. Taken for the Freshwater Project.

Michel Roggo / Underwater view of Anhumas Abyss, a lake within a cave, Bonito area, Serra da Bodoquena (Bodoquena Mountain Range), Mato Grosso del Sul, Brazil, November 2011. Taken for the Freshwater Project.

Michel Roggo / Anhumas Abyss a cave with freshwater lake, reflections of blue and green caused by magnezium and limestone in the cavern rocks, Bonito area, Serra da Bodoquena (Bodoquena Mountain Range), Mato Grosso...

Michel Roggo / Michel Roggo and Daniel Buergy abseiling into Anhumas Abyss, Bonito area, Serra da Bodoquena (Bodoquena Mountain Range), Mato Grosso del Sul, Brazil, November 2011. Taken for the Freshwater Project.

Fabrice Cahez / Misty Beech (Fagus sylvatica) forest in autumn, Vosges mountains, France, November 2013

Fabrice Cahez / Misty Beech (Fagus sylvatica) forest in autumn, with sun rays shining through trees, Vosges mountains, France, November 2013

Fabrice Cahez / Landscape with light rays over forest, Lozere, Causse Mejean, Gorges de la Jonte, France, December 2013

Fabrice Cahez / Landscape with light rays over forest, Lozere, Causse Mejean, Gorges de la Jonte, France, December 2013

Fabrice Cahez / Landscape with light rays over forest, Lozere, Causse Mejean, Gorges de la Jonte, France, December 2013

Axel Gebauer / Sunlight shining through clouds onto snow, Kavkazsky Zapovednik, west Caucasus Mountains, Adygea, Russia, February.

Luis Quinta / Blue shark (Prionace glauca) Faial Island, Azores, Portugal, Atlantic Ocean, September.

Radomir Jakubowski / Sunbeams shining through low clouds over Coniferous forests, Vosges Mountains, France, November 2012.

Radomir Jakubowski / Sun rays over forests, Niederhorn mountain, Bernese Alps, Switzerland, August 2012.

Radomir Jakubowski / Sunbeams shining through low clouds over Coniferous forests, Vosges Mountains, France, November 2012.

Fabrice Cahez / Morning mist over the countryside, Vosges, France, September 2013

Fabrice Cahez / Morning mist over the countryside, Vosges, France, September 2013

Fabrice Cahez / Sunrise shining through the branches of trees, Vosges, France, July.

Fabrice Cahez / Sunrise shining through the branches of trees in mist, Vosges, France, July.

Benoit Stichelbaut / Rough seas during Storm 'Ruth', Ile d'Ouessant, Armorique Regional Park. Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finistere, Mer d'Iroise, Iles...

Sebastian Kennerknecht / Sunbeams penetrating through lowland rainforest canopy, Tawau Hills Park, Sabah, Borneo, Malaysia

Andy Rouse / Cheetahs (Acinonyx jubatus) on grassland, Masai Mara, Kenya

Alex Mustard / Sunbeams, refracted on a shallow seabed. Alghero, Sardinia, Italy. Mediterranean Sea.

Alex Mustard / Afternoon sunrays dancing over rocks, in shallow water. Capo Comino, Sardinia, Italy. Mediterranean Sea.

Ben Lascelles / Halo around sun, Tibetan Plateau, June 2010. Halos are a sign of high thin cirrus clouds drifting 20,000 feet or more above our heads. These clouds contain millions of tiny ice crystals. The halos are...

Alex Mustard / Florida manatee (Trichechus manatus latirostris) swimming in evening sunbeams, Three Sisters Spring, Crystal River, Florida, USA.

Alex Mustard / 2020VISION / Blue lion's mane jellyfish (Cyanea lamarckii) in sunbeams in the open sea off the Island of Coll, Inner Hebrides, Scotland, UK, North Atlantic Ocean, July

Tim Laman / Sunbeams shining through clouds onto the lagoon of Fakarava Atoll, Tuamotu Islands, French Polynesia. July 2006

Thomas Marent / Sunbeams pierce the canopy in Lamington National Park, Queensland, northern Australia

Mark Taylor / Blue sky and clouds with sunbeams.

Alex Mustard / Fish-eating anemone (Urticina piscivora) in shallow water beneath forest and with sunbeams, Browning Pass, Vancouver Island, British Columbia, Canada, Queen Charlotte Strait, Pacific Ocean.

David Fleetham / Great white sharks (Carcharodon carcharias) swimming through sunbeams, Guadalupe Island, Mexico.

Lewis Jefferies / Compass jellyfish (Chrysaora hysoscella) swimming up towards surface with sunbeams, Falmouth, Cornwall, August.

Alex Mustard / Blue shark (Prionace glauca) cruises beneath the surface of the English Channel with sunbeams and lens flare. Penzance, Cornwall, England, United Kingdom. British Isles. North East Atlantic Ocean.

Alex Mustard / Shoal of Lesser sandeels (Ammodytes tobianus) swims through thongweed (Himanthalia elongata) and sunbeams. Falmouth, Cornwall, England, United Kingdom. British Isles. North East Atlantic Ocean.

Alex Mustard / Shoal of lesser sandeels ( Ammodytes tobianus) swims through thongweed (Himanthalia elongata) and sunbeams. Falmouth, Cornwall, England, United Kingdom. North East Atlantic Ocean.

Alex Mustard / Shoal of lesser sandeels (Ammodytes tobianus) swims through thongweed (Himanthalia elongata) and sunbeams. Falmouth, Cornwall, England, United Kingdom. North East Atlantic Ocean.

Alex Mustard / Sunbeams play through the roots of red mangrove trees (Rhizophora sp.), encrusted with marine life and home to schoolmaster snappers (Lutjanus apodus). Jardines de la Reina, Gardens of the Queen Natio...

Alex Mustard / Sunbeams play through the roots of red mangrove trees (Rhizophora sp.), encrusted with marine life and home to schoolmaster snappers (Lutjanus apodus). Jardines de la Reina, Gardens of the Queen Natio...