Nick Garbutt / Aggregation / bloom / swarm of Moon Jellyfish (Aurelia aurita) in the clear waters of Loch Na Keal, off the Isle of Mull, north west Scotland, UK, June, Photographed through the surface.

Michel Roggo / Water hyacinth (Eichhornia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project. Finalist in the Wildlife Photographer of the Year Awards (WPOY) Competition 2017.

Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) adults guarding chick, Ria Lagartos Biosphere Reserve, Yucatan Peninsula Mexico, June. Bookplate.

Juergen Freund / Mud crab (Scylla serrata) in shallow sandy water. Split level with island and thatched house on stilts. Moromahu Island, Wakatobi, South Sulawesi, Indonesia. Second Place in the Portfolio Award of the...

Jack Dykinga / Snow geese (Anser caerulescens) flying toward their gathering pond, with moon in the background, Boque del Apache National Wildlife Refuge, New Mexico. December.

Olga Kamenskaya / Clear pane of ice on Lake Baikal, Siberia, Russia, March 2007.

Olga Kamenskaya / Ice formations on Lake Baikal, Siberia, Russia, March 2007.

Olga Kamenskaya / Transparent ice formation on Lake Baikal, Siberia, Russia, March 2012.

Olga Kamenskaya / Ice formations on Lake Baikal, Siberia, Russia, March 2012.

Hougaard Malan / Large wave crashing against rock shelf. Luphathana, Pondoland, Eastern Cape, South Africa. June 2012.

Hougaard Malan / Rock formations in clear water on Anse Source d'Argent beach. La Digue Island, Seychelles. October, 2012.

Olga Kamenskaya / Man looking into ice hole dug for ice diving, Lake Baikal, Siberia, Russia, March. Model released.

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) breaching whilst attacking seal decoy, Seal Island, False Bay South Africa.

Staffan Widstrand,Staffan Widstrand / Fishermen in boats, Pulicat Lake, Tamil Nadu, India, January 2013.

Bence Mate / Forked lightning across horizon at night, with mixed flock of birds, Lake Csaj, Kiskunsagi National Park, Hungary, July 2006

Bence Mate / Forked lightning across horizon, with mixed flock of birds, Lake Csaj, Kiskunsagi National Park, Hungary, July 2006

Gavin Hellier / Aerial view of the famous Blue Lagoon and Belcekiz beach along the 'Turquoise' coast, Oludeniz near Fethiye, Mediterrean Coast, Turkey 2008

Gavin Hellier / Aerial view of the famous Blue Lagoon and Belcekiz beach along the 'Turquoise' coast, Oludeniz near Fethiye, Mediterrean Coast, Turkey 2008

Andy Trowbridge / Split level shot of a fly fisherman (Murray Trowbridge) releasing a large brown trout (Salmo trutta) in a gin clear 'backcountry' river, North Canterbury South Island, New Zealand. January, 2012. Mode...

Cheryl-Samantha Owen / Blacktip reef sharks (Carcharhinus melanopterus) swimming in shallow crystal clear water, Aldabra Atoll, Seychelles, Indian Ocean

Cheryl-Samantha Owen / Blacktip reef sharks (Carcharhinus melanopterus) group swimming in shallow turquoise sea, Aldabra Atoll, Seychelles, Indian Ocean

Cheryl-Samantha Owen / Blacktip reef sharks (Carcharhinus melanopterus) swimming in shallow crystal clear water, Aldabra Atoll, Seychelles, Indian Ocean

Onne van der Wal / Split level view of 30ft Tiki catamaran "Abaco" aground in the shallows. Exumas, Bahamas, Caribbean. June 2009, property released.

Alex Mustard / Underwater scene where light and water interplay on a shallow sand bank, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea, September 2005.

Brent Stephenson / A rough and windy day in the Drake Passage with Force 9+ beaufort scale conditions. Drake Passage, South Atlantic, January.

Pete Oxford / Salt mounds and evaporation ponds (sea salt production plant started in the 1600's and worked by african slaves) Cargill Solar Salt Works, Pekelmeer lagoon, Bonaire, Netherlands Antilles, Caribbean

Linda Pitkin / 2020VISION / Dead man's fingers (Alcyonium digitatum), growing on rock faces below the kelp, St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October 2011. Did you know? Soft co...

Chris Gomersall / 2020VISION / Volunteers from Essex and Suffolk Water helping to clear gorse from heathland at Minsmere RSPB reserve, Suffolk, UK, February 2011. 2020VISION Book Plate.

Chris Gomersall / 2020VISION / Volunteers from Essex and Suffolk Water helping to clear gorse from heathland at Minsmere RSPB reserve, Suffolk, UK, February 2011.

Philip Stephen / Fishing vessel "Harvester" heading to North Sea fishing grounds in stormy weather. Europe, November 2010. Property released.

Alex Mustard / Split level of female California sea lions (Zalophus californianus) basking in the sun on the surface. La Paz, Baja California Mexico. Sea of Cortez, East Pacific Ocean. October

Eric Baccega / Icebergs and glacier under clear blue sky, Croker Bay, Devon Island, Nunavut, Canada, August 2010

Steven Kazlowski / Photographers photographing of a group of curious Polar bears (Ursus maritimus) from motorboats along a barrier island during autumn freeze up, Barter Island, 1002 area of the Arctic National Wildlife...

Fabio Liverani / Traditional fishermen of Weligama, seated on long poles, fishing with rods, Sri Lanka, June 2010

Philip Stephen / Fishing vessel "Ocean Harvest" in huge waves on the North Sea, September 2010. Property released.

Onne van der Wal / Tethered tender floating on clear waters in the Exumas, Bahamas, Caribbean. June 2009.

Onne van der Wal / Crystal clear shallows under a blue sky. Exumas, Bahamas, Caribbean, June 2009.

Jerry Monkman / Lone hiker at sunrise on the Bold Coast trail in Cutler, Maine, USA, June 2009. Model released

Wild Wonders of Europe / Lilja / Clear sea water showing stones below the surface, Karpaz Peninsula, North Cyprus, April 2009

Wild Wonders of Europe / Lilja / Clear sea water showing stones beneath surface, Karpaz Peninsula, North Cyprus, April 2009

Wild Wonders of Europe / Biancarelli / Chub (Leuciscus cephalus) swimming in crystal clear water, Plitvice National Park, Croatia, October 2008

Luciano Candisani / Piraputanga (Brycon hilarii) schooling in clear water stream, Cerrado Ecosystem, Bodoquena Plateau, Brazil

Norbert Wu / Red Mangrove (Rhizophora mangle) roots create sediment filter to clear water, young trees rise up from salt water, Palau

Juergen Freund / Split level shot of snorkler swimming in clear shallow water over sand, Malaysia.

Phil Savoie / View of a freshwater lake, Beaverhead National Forest, Montana, July 2011.

Ingo Arndt / Cracks in clear ice of Lake Baikal, Siberia, Russia. February.

Ingo Arndt / Snow blowing in wind, over cracks in the clear ice of Lake Baikal. Siberia, Russia. February.

Ingo Arndt / Cracks in the clear ice of Lake Baikal, Siberia, Russia. February.

Ingo Arndt / Ice formations with clear ice. Lake Baikal, Siberia, Russia. February.

Shane Gross / Green sea turtle (Chelonia mydas) in clear, blue water off North Sulawesi, Indonesia.

Tony Wu / Aerial panorama of Fonua'one'one Island in the Vava'u island group of the Kingdom of Tonga, with a boat in the foreground for scale. From this perspective, it is clear that the island comprises only a...

SCOTLAND: The Big Picture / Kelp forest (Laminaria hyperborea) in the clear seas of Scotland, UK, September.

Jed Weingarten / Wild Wonders of China / Small waterfall plunges into a clear pool, Tangjiahe nature reserve, Sichuan province, China. April.

Franco Banfi / Scuba diver exploring a natural karst spring with clear water, Bonito, Mato Grosso do Sul, Brazil

Ashley Cooper / Clear water from Dettifoss waterfall mixing with glacial meltwater of River Jokulsa a Fjollum from the Vatnajokull ice sheet. Iceland, September 2010

Ashley Cooper / Cumulo Nimbus cloud and rainbow seen from an aeroplane window over the Argentinian coast. Argentina. February 2014

Ashley Cooper / Cumulo Nimbus cloud seen from an aeroplane window over Argentina. February 2014

Ashley Cooper / Cumulo Nimbus cloud seen from an airplane window over Argentina. February 2014

Ashley Cooper / Victorian promenade shelter destroyed by severe storm, Aberystwyth, Wales, UK. January 2014

Ashley Cooper / Victorian promenade shelter destroyed by severe storm, Aberystwyth, Wales, UK. January 2014

Ashley Cooper / Paving slabs which have been ripped up and tossed 30 feet across the street after severe storm, Aberystwyth, Wales, UK. January 2014

Ashley Cooper / Resident carrying belongings through flood waters, Toll Bar near Doncaster, South Yorkshire, England, UK, 28th July 2007.

Ashley Cooper / Resident inside flooded house, Toll Bar near Doncaster, South Yorkshire, England, UK, 28th July 2007.

Ashley Cooper / Interior view of house during flooding, Toll Bar near Doncaster, South Yorkshire, England, UK, 28th July 2007.

Ashley Cooper / Interior view of house during flooding, Toll Bar near Doncaster, South Yorkshire, England, UK, July 2007.

Ashley Cooper / Interior view of house during flooding, Toll Bar near Doncaster, South Yorkshire, England, UK, July 2007.

Ashley Cooper / Car in flood waters in the village of Toll Bar near Doncaster, South Yorkshire, England, UK, 28th July 2007.

Ashley Cooper / Pumping out floodwater from the Civic Centre in Carlisle, Cumbria on Tuesday 8th December 2015, after torrential rain from storm Desmond. England, UK, December 2015.

Ashley Cooper / Environment Agency staff pumping out floodwater from Hardwicke Circus in Carlisle, Cumbria on Tuesday 8th December 2015, after torrential rain from storm Desmond. England, UK, December 2015.

Ashley Cooper / Pumping out floodwater from Hardwicke Circus in Carlisle, Cumbria on Tuesday 8th December 2015, after torrential rain from storm Desmond. England, UK, December 2015.

Tony Heald / Southern elephant seal (Mirounga leonina), two males fighting with female in forground, Gold Harbour, South Georgia. October 2017.

Robert Thompson / Beach at sunrise, Murlough National Nature Reserve, Dundrum, County Down, Northern Ireland, UK. December 2013.

Franco Banfi / Fish in the crystal-clear water, Plitvice Lakes National Park, UNESCO World Heritage Site, Central Croatia. Croatia

Alex Mustard / Ripples in the sand of a shallow sandbar in clear water. Stingray City Sandbar, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Michel Roggo / Spring creek at very high water level, tributary of floodplain river Rio Miranda. With aquatic plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazil. November. Photograp...

Michel Roggo / Spring creek at very high water level, tributary of floodplain river Rio Miranda. With aquatic plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazil. November. Photograp...

Michel Roggo / Red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) and red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) and red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) and red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Dead wood and aquatic plants in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) and red Ludwigia (Ludwigia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project.

Michel Roggo / Cichlid fish (Geophagus sp) and Water hyacinth (Eichhornia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) in a clear stream of the Pantanal, Brazil. Photographed for The Freshwater Project

Michel Roggo / Diver in crystal clear spring creek, flowing in to the muddy floodplain rivers Rio Salobra and Rio Miranda, with water plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazi...

Michel Roggo / Crystal clear spring creek, flowing in to the muddy floodplain rivers Rio Salobra and Rio Miranda, with water plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazil. Photog...

Michel Roggo / Crystal clear spring creek, flowing in to the muddy floodplain rivers Rio Salobra and Rio Miranda, with water plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazil. Photog...

Michel Roggo / Water hyacinth (Eichhornia sp.) in crystal clear spring creek, Pantanal, Mato Grosso do Sul, Brazil. Photographed for The Freshwater Project

Michel Roggo / Water hyacinth (Eichhornia sp.) in crystal clear spring creek, Pantanal, Mato Grosso do Sul, Brazil. Photographed for The Freshwater Project

Michel Roggo / Crystal clear spring creek, flowing in to the muddy floodplain rivers Rio Salobra and Rio Miranda, with water plants mainly Water hyacinth (Eichhornia sp.) Pantanal, Mato Grosso do Sul, Brazil. Photog...

Michel Roggo / Spring creek at very high water level, with aquatic plants mainly Water hyacinth (Eichhornia sp.). Tributary of floodplain river Rio Miranda. Pantanal, Mato Grosso do Sul, Brazil. November. Photograph...

Michel Roggo / Spring creek at very high water level, with aquatic plants mainly Water hyacinth (Eichhornia sp.). Tributary of floodplain river Rio Miranda. Pantanal, Mato Grosso do Sul, Brazil. November. Photograph...

Michel Roggo / Aerial view of the Danube Delta with murky water of the Danube river mixing with the clear water of the delta channels, Danube Delta Biosphere Reserve UNESCO World Heritage Site,, Romania May 2014. Ph...

Michel Roggo / Photographer Michel Roggo at work photographing underwater in a clear stream for the Freshwater Project, Pantanal, Brazil. November 2016.