Guy Edwardes / Rock formations at Kimmeridge Bay, Clavell Tower in background, Isle of Purbeck, Jurassic Coast, Dorset, England, UK. December 2010.

Guy Edwardes / Callanish Standing Stones, Isle of Lewis, Outer Hebrides, Scotland, UK. March 2015.

Guy Edwardes / Callanish Standing Stones, Isle of Lewis, Outer Hebrides, Scotland, UK. March 2015.

Guy Edwardes / Callanish Standing Stones, Isle of Lewis, Outer Hebrides, Scotland, UK. March 2015.

Guy Edwardes / Fairy Pools with Black Cuillin mountains in background, Isle of Skye, Inner Hebrides, Scotland, UK. January 2014.

Guy Edwardes / Fairy Pools with Black Cuillin mountains in background, Isle of Skye, Inner Hebrides, Scotland, UK. January 2014.

Guy Edwardes / Fairy Pools and Black Cuillins, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK. February 2017.

Guy Edwardes / Fairy Pools with Cuillin range in background, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK. January 2015.

Nick Upton / Common starfish (Asterias rubens) moving in a rockpool, real time, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) and a Rock goby (Gobius paganellus) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Rock goby (Gobius paganellus) stealing food from a scavenging Common prawn (Palaemon serratus) in a rockpool, Cornwall, England, UK, September.

Ernie Janes / Low tide on the Wash, Snettisham, Norfolk, England, UK, February.

Ole Jorgen Liodden / Marine iguana (Amblyrhynchus cristatus) silhouetted on the coast at sunset, Galapagos.

Hougaard Malan / Lighthouse at sunset. Kommetjie, Cape Town, South Africa. November 2008.

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

Alex Mustard / 2020VISION / View up through tidepool of 2020Vision young photographer, Bertie Gregory, Falmouth, Cornwall, UK, July 2011. Model released. Did you know? Life isnt easy in a rock pool! Animals here must deal with c...

Alex Hyde / The Fairy Pools, on the Allt Coir' a' Mhadaidh river running down from the Cullin Hills, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, February 2010.

Guy Edwardes / Svartifoss / Black Falls, Skaftafell National Park Iceland, July 2009

Nick Upton / Rock cook / Small mouthed wrasse (Centrolabrus exoletus) caught in a rock pool on a low tide, being taken out of a fishing net. Cornwall, UK.

Wild Wonders of Europe / Muñoz / Algae growing in a pool on a rock, Scarista Beach, Sound of Taransay, South Harris, Outer Hebrides, Scotland, UK, June 2009

Wild Wonders of Europe / O. Haarberg / Algae growing in rock pools on rocky coast, Lngviksskr, Stockholm Archipelago, Sweden, June 2009

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

Solvin Zankl / Split level shot with Scottish coastline above and underwater Barnacle (Balanus balanoides) encrusted rock, UK

George Sanker / Exposed beach with rock pools at low tide, at dawn. Acadia National Park, Maine, USA. February 2018.

Heather Angel / Travertine terrace in karst landscape. Huanglong / Yellow Dragon Scenic World Heritage Site, south Minshan range, Sichuan Province, China. 2007.

Nick Upton / Duckpool Beach and rock pools at low tide, with a variety of green and brown algae covering rocks, near Bude, Cornwall, UK, September 2018.

Duncan Murrell / Yellow-lipped / banded sea krait (Laticauda colubrina) in a tide pool in the Woodin Canal in the Lagoons of New Caledonia: Reef Diversity and Associated Ecosystems UNESCO World Heritage Site. New Cale...

SCOTLAND: The Big Picture / Section of River Feshie that has cut through forest resulting in gravel banks, tree debris and woodland pools. Glenfeshie, Cairngorms National Park, Scotland, UK.

SCOTLAND: The Big Picture / Section of River Feshie that has cut through forest resulting in gravel banks, tree debris and woodland pools. Glenfeshie, Cairngorms National Park, Scotland, UK.

Steven David Miller / People swimming in freshwater pools on Waterfall Creek, at the top of Gunlom Falls. Mary River, Kakadu National Park, Northern Territory, Australia. March 2014.

Steven David Miller / Freshwater pools on Waterfall Creek, at the top of Gunlom Falls. Mary River, Kakadu National Park, Northern Territory, Australia. March 2014.

Steven David Miller / Freshwater pools on Waterfall Creek, at the top of Gunlom Falls. Mary River, Kakadu National Park, Northern Territory, Australia. March 2014.

Paul Williams / Using a specialist motion control rig to film underwater timelapse in a rockpool. On production for BBC Blue Planet II, Vancouver island, British Columbia, Canada, July.

Paul Williams / Ochre starfish (Pisaster ochraceus) Goose barnacles (Pollicipes polymerus) California mussel (Mytilus californianus) and Giant green anenome (Anthopleura xanthogrammica) in rock pool, Vancouver Island...

Paul Williams / Ochre starfish (Pisaster ochraceus), Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus) in rock pool, Vancouver Island, British Columbia, Canada, July.

Paul Williams / Specialist motion control rig to film underwater timelapse in a rockpool for BBC Blue Planet II, Vancouver island, British Columbia, Canada, July.

Paul Williams / Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus), Vancouver Island, British Columbia, Canada, June.

Paul Williams / Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus), Vancouver Island, British Columbia, Canada, June.

Paul Williams / Specialist motion control rig to film underwater timelapse in a rockpool for BBC Blue Planet II, Vancouver island, British Columbia, Canada. July.

Paul Williams / Ochre starfish (Pisaster ochraceus) California mussel (Mytilus californianus) and Giant green anenome (Anthopleura xanthogrammica) in rock pool, Vancouver Island, British Columbia, Canada. July.

Robin Chittenden / Ringed plover (Charadrius hiaticula), Fuerteventura, Canary Islands, Spain. February.

Sandra Bartocha / Coastline of small rocky island (skerry) Bohuslan Archipelago , Sweden , July 2015.

Sandra Bartocha / Rock pool on the coast of the Stockholm Archipelago, Sweden

Robert Thompson / Common hermit crab (Pagurus bernhardus) in rock pool, Ballywhoriskey Point, County Donegal, Northern Ireland.

Robert Thompson / Blenny (Lipophrys pholis) Ballywhoriskey Point, Fanad Peninsula, County Donegal, Northern Ireland.

Nick Upton / Velvet swimming crab (Necora puber) in a rock pool, waving and opening one of its claws in a threat display, Cornwall, England, UK, September.

Nick Upton / Velvet swimming crab (Necora puber) moving off, leaves frame, Cornwall, England, UK, September.

Nick Upton / Timelapse of a Common starfish (Asterias rubens) moving in a rockpool, speeded up four times, Cornwall, England, UK, September.

Nick Upton / Squat lobster (Galathea squamifera) hiding under a stone in a rockpool, threat display, Cornwall, England, UK, September.

Nick Upton / Spiny starfish (Marthasterias glacialis) squeezing into a crevice in a rockpool as a Common prawn (Palaemon serratus) swims past, Cornwall, England, UK, September.

Nick Upton / Snakelocks anemone (Anemonia viridis) feeding in a rock pool, waving its tentacles, Cornwall, England, UK, September.

Nick Upton / Close up of a Snakelocks anemone (Anemonia viridis) feeding in a rock pool, waving its tentacles, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) scavenging on a damaged Flat top shell (Gibbula umbilicalis) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) and a Shanny (Lipophrys pholis) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Common prawns (Palaemon serratus) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, with a a Rock goby (Gobius paganellus) swimming past, Cornwall, England, UK, September.

Nick Upton / Rock goby (Gobius paganellus) stealing food from a scavenging Common prawn (Palaemon serratus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Montagu's crab (Xantho hydrophilus) in a rockpool, showing threat posture with open claws raised, walks out of frame, Cornwall, England, UK, September.

Nick Upton / Two Montagu's crabs (Xantho hydrophilus) competing for a crevice to hide in within a rockpool, with a young Velvet swimming crab (Necora puber) moving away nearby, Cornwall, England, UK, September.

Nick Upton / Two Montagu's crabs (Xantho hydrophilus) competing for a crevice to hide in within a rockpool, Cornwall, England, UK, September.

Nick Upton / Montagu's crab (Xantho hydrophilus) moving behind a stone in a rockpool to hide in a rockpool low on the shore, near Falmouth, Cornwall, England, UK, September.

Nick Upton / Green sea urchin (Psammechinus miliaris) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Edible crab (Cancer pagurus) in a rockpool, leaves frame, Cornwall, England, UK, September.

Nick Upton / Cushion star (Asterina gibbosa) moving in a rockpool near some Flat top shells (Gibbula umbilicalis), Cornwall, England, UK, September.

Nick Upton / Common brittle star (Ophiothrix fragilis) moving in a rockpool, with a Common limpet (Patella vulgata) nearby, Cornwall, England, UK, September.

SCOTLAND: The Big Picture / Waterfall on upland stream with Bruach na Frithe and Cuillins in background, Fairy Pools, Glen Brittle, Isle of Skye, Scotland, UK, October 2016.

SCOTLAND: The Big Picture / Waterfall on upland stream with Bruach na Frithe and Cuillins in background, Fairy Pools, Glen Brittle, Isle of Skye, Scotland, UK, October 2016.

Tim Fitzharris / Coffee Pot Rock and the Seven Sacred Pools at sunset near Sedona, Arizona

Tim Fitzharris / Coffee Pot Rock and the Seven Sacred Pools at sunset near Sedona, Arizona

SCOTLAND: The Big Picture / Waterfalls at Fairy Pools, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, October 2013.

SCOTLAND: The Big Picture / Waterfalls at Fairy Pools, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, October 2013.

SCOTLAND: The Big Picture / Waterfalls at Fairy Pools, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, October 2013.

Tim Fitzharris / Pools in rocks, Seven Sacred Pools, Coffee Pot Rock, Red Rock-Secret Mountain Wilderness, Arizona

Tim Fitzharris / Pools in rocks, Seven Sacred Pools, Coffee Pot Rock, Red Rock-Secret Mountain Wilderness, Arizona

Graham Eaton / Forest trees and peat, which were covered by the sea following the last ice age, exposed on beach at low tide, Borth, Wales. September.

Graham Eaton / Forest trees and peat, which were covered by the sea following the last ice age, exposed on beach at low tide, Borth, Wales. September.

Guy Edwardes / Sunset at Cape Cornwall near St Just, Cornwall, England, UK. April 2014.

Guy Edwardes / View over Sandy beach towards Logan Rock from Treen Cliff, Porthcurno, Cornwall, England, UK. April 2009.

Guy Edwardes / Sunset at Cape Cornwall near St Just, Cornwall, England, UK. April 2014.

Solvin Zankl / Intertidal rocks covered in seaweeds, including brown algae: Toothed wrack (Fucus serratus), and Thongweed (Himanthalia elongata), red algae: left Chylocladia verticillata, middle Pepper Dulse (Osmu...

Solvin Zankl / Intertidal rocks covered in seaweeds, including, brown algae: at top Toothed wrack (Fucus serratus) and on the left Bifurcaria bifurcata. Red algae: middle and bottom right Pepper dulse (Osmundea pinn...

Alex Hyde / Shallow pool on an area of limestone pavement containing Freshwater grapes (Nostoc sp.), a blue-green algae or cyanobacteria. Gait Barrows National Nature Reserve, Lancashire, UK. September.

Alex Hyde / Shallow pool on an area of limestone pavement containing Freshwater grapes (Nostoc sp.), a blue-green algae or cyanobacteria. Gait Barrows National Nature Reserve, Lancashire, UK. September.

Sven Zacek / Aerial view of people on sandy beach of the Baltic Sea, Parnu, Estonia. July.

Juan Carlos Munoz / Waterfall, Soca river, Soca Valley, Julian Alps, Slovenia, Europe

Michael Hutchinson / Cape river frog (Amietia fuscigula) resting on rock, Cederberg, South Africa, December.

Michael Hutchinson / Cape river frog (Amietia fuscigula) resting near waterfall, Cederberg, South Africa, December.

Erlend Haarberg / Tide pools with green algae, Stockholm archipelago, Sweden, June.

Christophe Courteau / Snakelocks anemone (Anemonia viridis) and Common anemone (Actinia equina) in rock pool, Brittany, France, January.

Christophe Courteau / Snakelocks anemone (Anemonia viridis) in rock pool, Brittany, France, January.

Alex Hyde / Brown / Common Shrimp (Crangon crangon) showing close up of reflecting superposition compound eyes. Isle of Mull, Scotland, UK. June.

Ernie Janes / Dunlin (Calidris alpina) feeding in coastal pool, Norfolk, February.

Mike Potts / Auckland Island teal (Anas aucklandica) foraging in shallow pools. Flightless bird. Enderby Island, Auckland group (Subantarctic), New Zealand, February.

Mike Potts / Auckland Island teal (Anas aucklandica) foraging in shallow pool. Flightless bird. Enderby Island, Auckland group (Subantarctic), New Zealand, February.

Hougaard Malan / Rocky shore on a sunny summer day. Arniston/Waenhuiskrans, Western Cape, South Africa. February 2010. Non-ex.