Ingo Arndt / Bed of Blue mussels (Mytilus sp.) densely packed together on rock, Lamberts Bay, South Africa

Jack Dykinga / Rain spattered inter-locking palm leaves create a design of pattern and colour in the tropical rainforest. Osa Peninsula, Costa Rica

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.

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

SINCLAIR STAMMERS / Phase contrast photomicrograph of Blue green alga / Cyanobacteria (Spirulina platensis) each algal filament or Trichome is 5 microns in diameter.

Tui De Roy / Bottlenose Dolphin (Tursiops truncatus) leaping playfully through calm inter-island seas, Hood Island, Galapagos Islands, Ecuador

Ashley Cooper / Ancient Stone graves at Heysham, Lancashire, England, UK, January 2006.

Lucas Bustamante / Sally lightfoot crab (Grapsus grapsus) on inter tidal rock, Santiago Island, Galapagos.

Niall Benvie / Trees with inter-tangled roots, pulled over during storm, in Glen Brittle, Isle of Skye, Scotland, UK, September.

Michael Pitts / Inter Island container ship, aground and wrecked, Yonaguni Island, East China Sea, Japan. February 2014.

Michael Pitts / Inter Island container ship, aground and wrecked, Yonaguni Island, East China Sea, Japan. February 2014.

Konrad Wothe / Baobabs (Adansonia rubrostipa) growing inter-twined with each other, near Morondava, Madagascar

Fiona Rogers / Western chimpazee (Pan troglodytes verus) infant male 'Flanle' aged 3 years riding on his mothers back - note six digits to right hand which may be a result of inter breeding within such a small commu...

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...

Nick Upton / Rayed trough shell (Mactra stultorum), partially buried in sand with siphons visible exposed on a low spring tide. Rhossili, The Gower peninsula, Wales, UK, July.

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

Nick Upton / Snakelocks anemone (Anemonia viridis) among Coralweed (Corallina officinalis) ejecting remains of its prey, a mussel shell. Rhossili, The Gower Peninsula, July.

Nick Upton / Snakelocks anemone (Anemonia viridis) attached to a boulder alongside Coralweed (Corallina officinalis) and Flat / Purple top shells (Gibbula umbilicalis) in a rockpool, Rhossili, The Gower Peninsula,...

Nick Upton / Snakelocks anemone (Anemonia viridis) filter feeding in a rockpool, with closed Beadlet anemone (Actinia equina) in the background. Rhossili, The Gower Peninsula, July.

Nick Upton / Shore crab (Carcinus maenas) in defensive posture with claws raised in crevice under Coralweed (Corralina officinalis). Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Sea slater / Beach woodlouse (Ligia oceanica) on pebbles. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Sea slater / Beach woodlouse (Ligia oceanica) on pebbles. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Frosty sea mat (Electra pilosa) bryozoan colony growing on frond of Dulse (Palmaria palmata) red alga exposed on a low spring tide. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Close up of Frosty sea mat (Electra pilosa) bryozoan colony growing on frond of Dulse (Palmaria palmata) red alga exposed on a low spring tide. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Sea lettuce / Green laver (Ulva lactuca) growing in a rockpool alongside Coralweed (Corallina officinalis). Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Sea lettuce / Green laver (Ulva lactuca) growing in a rockpool alongside Coralweed (Corallina officinalis). Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Sand hopper / Beach hopper (Talitrus saltator) on pebble beach. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Yolk and developing embryo visible in Mermaid's purse egg case of Lesser spotted catshark / Dogfish (Scyliorhinus canicula) entangled with Coralweed (Corallina officinalis) in a rockpool. Rhossil...

Nick Upton / Yolk and developing embryo visible in Mermaid's purse egg case of Lesser spotted catshark / Dogfish (Scyliorhinus canicula) entangled with Coralweed (Corallina officinalis) in a rockpool. Rhossil...

Nick Upton / Yolk and developing embryo visible in Mermaid's purse egg case of Lesser spotted catshark / Dogfish (Scyliorhinus canicula) entangled with Coralweed (Corallina officinalis) in a rockpool. Rhossil...

Nick Upton / Head on view of Common Hermit crab (Pagurus bernhardus) in a Dog whelk shell crawling over floor of a rockpool. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Bristled chiton (Acanthochitona crinitus) attached to rocks exposed at low tide, Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Close up views of Spiral / Flat wrack (Fucus spiralis) surrounded by Channelled wrack (Pelvetia canaliculata) on rocks high on the shoreline, exposed at low tide, Rhossili, The Gower Peninsula, UK, Ju...

Alex Hyde / Broad-clawed Porcelain Crab (Porcellana platycheles) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Selection of gastropods commonly found in rockpools, clockwise from top left: Periwinkle (Littorina compressa / nigrolineata), Dogwhelk (Nucella lapillus / Thaius lapillus), Common Flat Periwinkle (Li...

Alex Hyde / Shagrug Nudibranch / Common Grey Seaslug (Aeolidia papillosa) on a white background. From the Isle of Skye, Inner Hebrides, Scotland.

Alex Hyde / Edible Crab (Cancer pagurus) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Beadlet Anemone (Actinia equina) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Common Flat Periwinkle (Littorina obtusata / littoralis) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Thongweed / Sea Thong (Himanthalia elongata) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

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

Alex Hyde / Five-bearded Rockling (Ciliata mustela) against white background. Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Butterfish / Gunnel (Pholis gunnellus) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Canopy Jumping Spider (Phidippus otiosus) female feeding on caught fly, against white background. Captive, orginating from North America.

Alex Hyde / Blenny / Common Blenny / Shanny (Lipophrys / Blennius pholis) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / Beadlet Anemone (Actinia equina) on a white background. Isle of Skye, Inner Hebrides, Scotland, UK. March.

Alex Hyde / Broad-clawed Porcelain Crab (Porcellana platycheles) on white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

Alex Hyde / European Eel (Anguilla anguilla) elver (juvenile) on a white background. Isle of Skye, Inner Hebrides, Scotland, UK. March.

Alex Hyde / Shore Clingfish / Cornish Sucker (Lepadogaster lepadogaster) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.

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

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

David Woodfall / Remains of submerged peat forest, 3-4,000 year old indicating a lower sea level in inter glacial period, Crosby, Merseryside, UK 2012

David Woodfall / Remains of submerged peat forest, 3-4,000 year old indicating a lower sea level in inter glacial period, Crosby, Merseryside, UK 2012

MYN / Niall Benvie / Lugworm (Arenicola marina), Scotland, UK, September meetyourneighbours.net project

Laurie Campbell / Carragheen / Irish moss seaweed (Chondrus crispus) exposed at low tide, Isle of Skye, Hebrides, Scotland, August

Chris Gomersall / 2020VISION / Inter-tidal mudflats and tidal creeks at ebb tide with feeding Curlew (Numenius arquata) and Redshank (Tringa totanus), Snettisham RSPB reserve, The Wash, Norfolk, England, UK, January

Chris Gomersall / 2020VISION / Inter-tidal mudflats and tidal creeks at ebb tide with feeding Curlew (Numenius arquata) and Redshank (Tringa totanus), Snettisham RSPB reserve, The Wash, Norfolk, England, UK, January

Chris Gomersall / 2020VISION / Inter-tidal mudflats and tidal creeks at ebb tide with feeding curlew (Numenius arquata) and redshank (Tringa totanus), The Wash, Norfolk, England, UK, January

Laurie Campbell / Channelled Wrack Seaweed (Pelvetia canaliculata) exposed at low tide, South Uist, Outer Hebrides, Scotland, July

Juergen Freund / Circle or C-hooks vs. traditional J-hooks of longline tuna fishing boat of Nutrindo Freshfood International, Sulawesi, Indonesia, October 2009. Changing from the classic J hook to C hooks can dramatic...

Jenny E. Ross / Two adult African elephants (Loxodonta africana) playfully joust by inter-locking tusks and trunks. Amboseli National Park, Kenya. September

Jenny E. Ross / Two adult African elephants (Loxodonta africana) playfully joust by inter-locking tusks and trunks. Amboseli National Park, Kenya. September

Simon Colmer / Bed of exposed Common / Blue mussel (Mytilus edulis) on rocks at low tide, Cornwall, England, UK

Anup Shah / Gelada baboon (Theropithecus gelada) inter-family aggression, Simien Mountains National Park, Ethiopia, November

Gary K. Smith / Curlew (Numenius arquata) feeding for worms on inter tidal mudflats, Norfolk UK, December

Gary K. Smith / Curlew (Numenius arquata) feeding for worms on inter tidal mudflats, Norfolk, UK, December

Philippe Clement / Empty Etang / shallow lakes used for fish farming in La Brenne where the lakes are inter-connected in series. France. 2007

Philippe Clement / Traditional wooden sluice, called "bonde", used in fish-farming in La Brenne where the lakes are inter-connected in series, France

Tui De Roy / Cuvier's Beaked Whale (Ziphius cavirostris) adult underwater in deep inter-island waters near Baltra Island, Galapagos Islands, Ecuador

Chris Gomersall / Shelduck (Tadorna tadorna) ducklings on rocky shore. Isle of Colonsay, Scotland UK. June 2006

Chris Gomersall / Female Shelduck (Tadorna tadorna) on rocky shore. Isle of Colonsay, Scotland UK. June 2006

Gary Smith / Common Terns {Sterna hirundo} feeding on Sand eels on inter tidal sands, Blakeney Point, Norfolk UK.

Jose B. Ruiz / Black sea urchin {Arabacia lixula} at low tide, Spain, Mediterranean

Tim Edwards / Plant life growing below and above tide line - from bottom: seaweed in inter-tidal zone, then black lichen, yellow lichen and green Samphire. Co Kerry, Republic of Ireland.

Nick Upton / Seven rayed (armed) starfish on seashore {Luidia ciliaris} Republic of Ireland

Kevin Schafer / Varve sediment layers, indicative of Pleistocene inter-glacial lake sediments, Discovery Park, Seattle, Washington

Paul D Stewart / Portrait of Georges-Louis Leclerc, Comte de Buffon. French naturalist (7 September 1707 - 16th April 1788). Steel engraving 1833 by Robert Hart with later colouring, from the painting by F.H. Drouais...

Paul D Stewart / Tableau to accompany Professor Agassiz opening sketch on 'The provinces of the animal world and their relationship to the types of man'. From Dr. Josiah C. Nott and George Gliddon's 'Types of Mankind'...

Nick Upton / Close up of Yellow boring sponge (Cliona celata) on limestone rocks exposed on a low spring tide. Rhossili, The Gower peninsula, UK, July.

Nick Upton / Yellow boring sponge (Cliona celata) and Ross worm tubes (Sabellaria spinulosa) on limestone rocks exposed on a low spring tide. Rhossili, The Gower peninsula, UK, July.

Nick Upton / Velvet swimming crab (Necora / Liocarcinus puber) and Common prawns (Palaemon serratus) in a rockpool. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Limestone rocks high on the shoreline dappled with patches of Black tar lichen (Hydropunctaria maura / Verrucaria maura) and heavily encrusted below with Montagu's stellate barnacles (Chthamalaus mont...

Nick Upton / Limestone rocks high on the shoreline dappled with patches of Black tar lichen (Hydropunctaria maura / Verrucaria maura) and heavily encrusted below with Montagu's stellate barnacles (Chthamalaus mont...

Nick Upton / Spiral / Flat wrack (Fucus spiralis) growing on rocks high on the shoreline, exposed at low tide. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Moulted crarapaces and legs of Common spider crabs / Spiny spider crabs (Maja brachydactyla / Maja squinado) and moulted carapaces washed up on Rhossili Bay, with the Worm's Head in the background, Th...

Nick Upton / Moulted carapaces and legs of Common spider crabs / Spiny spider crabs (Maja brachydactyla / Maja squinado) washed up on sandy beach. Rhossili Bay, The Gower Peninsula, UK, July.

Nick Upton / Moulted carapace and legs of Common spider crab / Spiny spider crab (Maja brachydactyla / Maja squinado) washed up on sandy beach. Rhossili Bay, The Gower Peninsula, UK, July.

Nick Upton / Snakelocks anemone (Anemonia viridis) filter feeding in a rockpool. Rhossili, The Gower Peninsula, July.

Nick Upton / Close up of Snakelocks anemone (Anemonia viridis) among Coralweed (Corallina officinalis) filter feeding in a rockpool. Rhossili, The Gower Peninsula, July.

Nick Upton / Juvenile Shore crab (Carcinus maenas) with partial red pigmentation in a shallow rockpool alongside Mussel shells. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Shore crab (Carcinus maenas) camouflaged as it hides in a crevice below Coralweed (Corralina officinalis) in a rockpool. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Shore crab (Carcinus maenas) with damaged claws feeding on a fragment of Sea lettuce (Ulva lactuca) in a rockpool. Rhossili, The Gower Peninsula, UK, July.

Nick Upton / Shore / Sea Bristletail (Petrobius maritimus / brevistylis) camouflaged on limestone rock with patches of Black tar lichen (Hydropunctaria maura / Verrucaria maura) alongside four Small periwinkles (M...