Peter Cairns / Reynisdrangar sea stacks at dusk, Vik, Iceland

Jack Dykinga / Shore Acres State Park with sandstone bluffs being pounded by tidal shifting surf, creating waterfalls over concretions in the stone. Oregon

Ernie Janes / Holkham beach at low tide, Norfolk, UK August

Andy Rouse / 2020VISION / Redshank (Tringa totanus) foraging on tidal flats. Liverpool Bay, UK, December.

Alex Hyde / Shore Crab (Carcinus maenas) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Various rockpool animals and seaweeds, photographed on a white background. Isle of Skye, Inner Hebrides, Scotland, UK, March. Digital composite.

Alex Hyde / Sea Scorpion / Bullfish (Taurulus bubalis) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Nick Upton / Split level view of a Beadlet anemone (Actinia equina) attached to a boulder encrusted with Maerl (Lithothamnion glaciale) a red coralline alga, in a large rockpool, Crail, Scotland, UK, July

David Tipling / 2020VISION / Bar-tailed Godwit (Limosa lapponica) foraging for tidal-flat worm. Norfolk, January. Sequence 2 of 2.

David Tipling / 2020VISION / Bar-tailed Godwit (Limosa lapponica) foraging for tidal-flat worm. Norfolk, January. Sequence 1 of 2.

Terry Whittaker / 2020VISION / Saltmarsh from the air, Abbotts Hall Farm, Essex

Ben Hall / Sanderlings (Calidris alba) group feeding on beach with sunrise on the horizon, Lincolnshire, UK December

Ben Hall / Curlews (Numenius arquata) group flying over the sea during storm. Wales, UK December. Highly commended, 'Habitat' division, British Wildlife Photography Awards (BWPA) competition 2012.

Ernie Janes / Cley Beach with retreating wave patterns, after sunset, Norfolk, UK January

Chadden Hunter / King penguins (Aptenodytes patagonicus) heading out to sea, crossing tidal surf to feed in the open seas, South Georgia. Taken on location for BBC Frozen Planet series, 2008

Ben Hall / 2020VISION / Curlew (Numenius arquata) in flight at dusk, Peak District NP, UK, March 2011. Did you know? Curlews spend their winters on estuaries and tidal flats, but move inland to fens, moors, bogs and heathlan...

Ernie Janes / Coastline with pier and groynes from Overstrand to Cromer with storm clouds overhead, Norfolk, UK, July 201

Kerstin Hinze / Aerial view of Westerhever Sand lighthouse and saltmarshes, Wadden Sea, Eiderstedt, Schleswig Holstein, Germany, June 2010

Anup Shah / Proboscis monkey (Nasalis larvatus) male walking across the mudflats of a mangrove swamp revealed at low tide with the sea in the background, Bako National Park, Sarawak, Borneo, Malaysia, March

David Tipling / 2020VISION / Black-tailed godwit (Limosa limosa) taking off from tidal pool, Snettisham RSPB reserve, Norfolk, UK, March. 2020VISION Exhibition. 2020VISION Book Plate. Did you know? The black-tailed godwit's bill...

Orsolya Haarberg / Coastal landscape at Dyrholaey, Iceland, April 2010

Robert Thompson / Aerial view of Black Strand beach, Malin Head, looking towards Trawbreaga Bay, Malin Head, County Donegal, Republic of Ireland, September 2009

Bryan and Cherry Alexander / Inuit hunters watching Huskies (Canis familiaris) making their way to shore across new tidal ice. Savissivik, Northwest Greenland, 1991.

Claudio Contreras / Northern elephant seal (Mirounga angustirostris) colony on beach, with juvenile / weaner in the surf, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, January

Guy Edwardes / Reynisdrangur stacks and black sand beach Vik i Myrdal at night, Iceland, June 2009

Ross Hoddinott / Burgh Island and Burgh Island hotel. Evening light at low tide. Taken from Bigbury Bay (Blue Flag beach) South Devon, UK. September 2009.

David Woodfall / Severn Estuary at ebb tide in rainstorm. This habitat is potentially threatened by proposed tidal barrage. England, UK April 2010

Roger Powell / Bar-tailed godwit (Limosa lapponica) in winter plumage, extracting a Lugworm from a deep hole at low tide, Boulmer, Northumberland, UK

David Woodfall / Traditional lave net fisherman (a method dating back at least 1,500 years) fishing for salmon. This Severn Estuary way of life is threatened by proposed barrage. Gloucestershire, England, July 2009, M...

Niall Benvie / Enteromorpha seaweed rooted in sand, exposed by spring tide, Scotland, uk

David Woodfall / Surfers & pleasure boats ride the bore, seen from the river. Severn Estuary. England

David Woodfall / Surfers on the bore. Severn Estuary. England

David Woodfall / Surfers on the bore. Severn Estuary. England

David Woodfall / Surfers on the bore. Severn Estuary. England

Laurie Campbell / Bar-tailed godwit (Limosa lapponica) feeding on tidal mudflat, Firth of Forth, Scotland, UK, February

Wild Wonders of Europe / Muñoz / Tidal landscape in Sound of Taransay, South Harris, Outer Hebrides, Scotland, UK, June 2009.

Wild Wonders of Europe / Muñoz / View of tidal landscape in the Sound of Taransay and North Harris, South Harris, Outer Hebrides, Scotland, UK, June 2009

Wild Wonders of Europe / Novák / Aerial view of water channel in the sand, Hallig, Germany, April 2009

Wild Wonders of Europe / Novák / Aerial view of coastal landscape at low tide with channels and pools, Hallig, Germany, April 2009

Wild Wonders of Europe / Novák / Aerial view of channels and pools left in sand at low tide, Hallig, Germany, April 2009

Wild Wonders of Europe / Lundgren / Whirlpool in the sea, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / The fastest current / Maelstrom in the world, Salstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / The current running out to sea, Saltstraumen, Bod, Norway, October 2008

Kirkendall-Spring / Tidal pool and rocks on the shore of Cape Lookout State Park, Oregon, USA

Kirkendall-Spring / Incoming tide surging around Starfish (Asteroidea) clinging to a rock, Toleak Point, Olympic NP, Washington, USA

Kirkendall-Spring / Rocks and tidal pools on Shi Shi Beach, Pacific Coast, Olympic NP, Washington, USA

Nick Upton / Golden samphire (Inula crithmoides) flowering on limestone rock outcrop just above the high tide line, Port Eynon, Gower Peninsula, Wales, UK, July.

Nick Upton / Golden samphire (Inula crithmoides) clump flowering on limestone rock outcrop just above the high tide line, Port Eynon, Gower Peninsula, Wales, UK, July.

Juan Carlos Munoz / Melting ice on Jokulsarlon beach. Southern Iceland, Europe, November 2012.

Fergus Gill / 2020VISION / Dunlin (Calidris alpina) bathing in a tidal pool, Outer Hebrides, Scotland, UK, June.

Colin Varndell / Mupe Rocks, Mupe Bay in East Dorset, UK, September 2007

Nick Upton / Herring gull (Larus argentatus) eating a Shore crab (Carcinus maenas) which it has caught in the Looe estuary at low tide, Cornwall, UK, June.

Nick Upton / Herring gulls (Larus argentatus) foraging in a flock in shallow sea water near shore for invertebrates disturbed from tide wrack by a high spring tide, Looe, Cornwall, UK, June.

Nick Upton / Herring gull (Larus argentatus) pecking at a Shore crab (Carcinus maenas) which it has caught in the Looe estuary at low tide, Cornwall, UK, June.

Nick Upton / Herring gull (Larus argentatus) landing among a flock foraging near shore for invertebrates disturbed from tide wrack by a high spring tide, Looe, Cornwall, UK, June.

Nick Upton / Herring gull (Larus argentatus) landing among a flock foraging near shore for invertebrates disturbed from tide wrack by a high spring tide, Looe, Cornwall, UK, June.

Nick Upton / Herring gulls (Larus argentatus) foraging in a flock in shallow sea water near shore for invertebrates disturbed from tide wrack by a high spring tide, with Downderry village in the background, Looe,...

Peter Cairns / 2020VISION / Mawddach Estuary at low tide, Barmouth, Snowdonia National Park, Gwynedd, Wales, May 2012.

Peter Cairns / 2020VISION / Mawddach Estuary at low tide, Barmouth, Snowdonia National Park, Gwynedd, Wales, May 2012.

Peter Cairns / 2020VISION / Mawddach Estuary at low tide, Barmouth, Snowdonia National Park, Gwynedd, Wales, May 2012.

Peter Cairns / 2020VISION / Trees moving in high winds along the edge of the Mawddach Estuary, Snowdonia National Park, Gwynedd, Wales, UK, May 2012.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) walking amongst the rock pools at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) female grooming a juvenile on a rocky beach at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) walking amongst the rock pools at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juveniles play fighting on a rock on beach at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) walking amongst the rock pools at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) subadult male sitting amongst the rock pools at low tide, Tangkoko National Park, Sulawesi, Indonesia.

Ross Hoddinott / Sea and stones at Porth Nanven beach, with rising tide at sunset, The Cot Valley, near Cape Cornwall, West Cornwall, UK. September 2012.

Ross Hoddinott / Sea and stgones at Porth Nanven, Cot Valley, near Cape Cornwall, West Cornwall, UK. June 2012.

David Noton / Sandwood Bay with clump of Marram grass growing on the beach, Sutherland, Scotland April 2012

Philippe Clement / Men looking for shellfish for consumption, like mussels and periwinkles, among the rocks along the North Sea coast, Nord-Pas-de-Calais, France August 2012

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) in tidal flats, taken with a remote camera car, Lake Clark National Park, Alaska

Ingo Arndt / Tidal channels at low tide, Cook Inlet, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) digging for clams on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) digging for clams on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) mother and cub digging for clams on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) mother and cub digging for clams on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) mother and cub digging for clams on tidal flats, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) mother and cub digging for clams on tidal flats, Lake Clark National Park, Alaska

Enrique Lopez-Tapia / Woman carrying sack of seaweed collected along shore, low tide, Jambiani East Coast, Zanzibar Island, Tanzania

Ernie Janes / RAF aeroplane at sunset over tidal creeks. Norfolk, UK, October 2012.

Andrew Parkinson / Redshank (Tringa totanus) adult foraging among seaweed in the tidal shallows. Shetland Islands, Scotland, UK, September.

Peter Cairns / Elgol beach on stormy day, Isle of Skye, Scotland

Peter Cairns / Icebergs on black sand beach at Jokulsarlon, south Iceland, June 2012

Loic Poidevin / Little ringed plover (Charadrius dubius) feeding on bloodworms along Atlantic Coast, Vendee, France, June

Jack Dykinga / Shore Acres State Park with sandstone bluffs being pounded by tidal shifting surf, creating waterfalls over concretions in the stone. Oregon

Ernie Janes / Flints on West Runton beach, Norkfolk, UK July

David Pattyn / Sunset over De Slufter Nature Reserve at the edge of the Wadden Sea, Texel Island, The Netherlands, June

Kerstin Hinze / Aerial view of Basnaes Nor and lagoon, Region Zealand, Denmark, July 2012

Kerstin Hinze / Aerial view of Oehe-Schleimuendung Nature Reserve at the mouth of river Schlei, Lotseninsel, Maasholm, Baltic Sea, Schleswig-Holstein, Germany, July 2012

Kerstin Hinze / Aerial view of Oehe-Schleimuendung nature reserve at the mouth of the river Schlei, Baltic Sea, Schleswig-Holstein, Germany, July 2012

Kerstin Hinze / Aerial view of Geltinger Birk Nature Reserve, Schleswig-Holstein, Germany, July 2012

Kerstin Hinze / Aerial view of Kegnaes Fyr, Kegnaes Lighthouse, Als, Baltic Sea, Denmark, July 2012

Nick Upton / Wide angle view of Rayed trough shell (Mactra stultorum), partially buried in sand with siphons visible exposed on a low spring tide, with the sea in the background, Rhossili, The Gower peninsula, Wal...

Nick Upton / Wide angle view of Rayed trough shell (Mactra stultorum), partially buried in sand with siphons visible exposed on a low spring tide, with the sea in the background. Rhossili, The Gower peninsula, Wal...