Franco Banfi / Conger eel, (Conger conger) on Teti shipwreck which sank on a stormy night on 23 May 1930, Komiza, Vis Island, Croatia, Adriatic Sea. .

David Woodfall / Little tern (Sterna albifrons ) feeding sand eel (Hyperoplus spp) to young chick. Gronant Dunes, Denbighshire, Wales, UK, June.

Nick Upton / European eel (Anguilla anguilla) elver migrating upstream, using an eel pass on the side of a weir, Somerset Levels, England, UK, July.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / European eel (Anguilla anguilla) elvers migrating up a wet rock next to a waterfall, Ceredigion, Wales, UK, July.

John Waters / Brook lamprey (Lampetra planeri) looking for food, River Kennet, Berkshire, England, UK. January.

Ann & Steve Toon / Arctic tern (Sterna paradisaea) with sandeel. Inner Farne, Northumberland, UK. July.

John Waters / Pair of Sea lampreys (Petromyzon marinus) spawning, one attempting to move a rock, River Wye, UK, June.

Andy Trowbridge / Puffin (Fratercula arctica) standing on Sea thrift (Armeria maritima) with wings out stretched with a beak full of sand eels. Close-up portrait. Fair Island, Shetland Islands, Scotland, July.

Andy Trowbridge / Atlantic Puffin (Fratercula arctica) in flight, coming into land with beak full of sand eels (Ammodytes tobianus). Fair Isle, Shetland Islands, Scotland, UK, July.

Alex Mustard,Alex Mustard / Portrait of a Yellow moray eel (Gymnothorax prasinus) - endemic to SE Australia. Chowder Bay, Sydney Harbour, New South Wales, Australia.

Eric Baccega / Common cormorant (Phalacrocorax carbo) catching a european eel (Anguilla anguilla), captive, Alsace, France.

David Tipling / 2020VISION / Arctic Tern (Sterna paradisaea) with sand eel in beak. Farne Islands, Northumberland, July.

Sue Daly / A shoal of Sand Eels (Ammodytes tobianus) against surface light. Channel Islands, UK, August.

David Woodfall / Collection of European eels (Anguilla anguilla) bred as part of breeding project, to be exported to Lough Neagh in Northern Ireland. UK. May 2010

Wild Wonders of Europe / Campbel / European river otter (Lutra lutra) feeding on eel in estuary of River Tweed, Northumberland, England, July 2009. WWE OUTDOOR EXHIBITION.

Wild Wonders of Europe / Lundgren / Marbled moray (Muraena helena) coming through hole with mouth open, Princesa Alice, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Marbled moray (Muraena helena) with mouth open, Princesa Alice, Azores, Portugal, June 2009

Wild Wonders of Europe / Banfi / Moray eel (Muraena helena) looking out of a hole in the artificial reef, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Banfi / Moray eel (Muraena helena) looking out of a hole in the artificial reef, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Wild Wonders of Europe / Banfi / Moray eel (Muraena helena) looking out from a hole in the artificial reef, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Andy Rouse / Atlantic puffin (Fratercula arctica) by burrow, carrying unpalatable pipefish for chick due to Sand eel over-fishingm, Fair Isle, Shetland, UK

Andy Rouse / Puffin (Fratercula arctica) landing carrying Sand eels in beak, Fair Isle, Shetland Islands, UK

Graham Eaton / Herring Gull (Larus argentatus) feeding on sandeel, underwater shot, Cardigan Bay, Wales, UK, June

Graham Eaton / Arctic Tern (Sterna paradisaea) fishing for sandeel, Anglesey, Wales, UK, July

Wild Wonders of Europe / Zankl / Mediterranean moray eel (Muraena helena) Malta, Mediteranean, June 2009

Jane Burton / Young European eels / elvers {Anguilla anguilla}, UK

Michel Roggo / European Eel (Anguilla anguilla) juveniles migrating upstream, Rhine River, Switzerland, 1992

David Tipling / Atlantic Puffin {Fratercula arctica} with Sandeels in beak, Scotland, UK.

Rolf Nussbaumer / Puffin with sandeel, flapping wings {Fratercula arctica} Norway.

Solvin Zankl / Puffin {Fratercula arctica} landing with sandeels in beak, Orkney, Scotland, UK 2006

David Kjaer / Puffin in flight with sand eels in beak {Fratercula arctica} Farne Is, Northumberland, UK

TIM MARTIN / European eel.

Pete Oxford / Puffin with sandeels in beak, Fair Isle (Fratercula arctica) UK Scotland

John Cancalosi / Puffin with sandeels. England

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 / Seagrass meadow ( Zostera marina). Swanage, Dorset, England, United Kingdom. English Channel. North East Atlantic

Alex Mustard / View inside a seagrass meadow (Zostera marina). Swanage, Dorset, England, United Kingdom. English Channel. North East Atlantic

Alex Mustard / Spiny seahorse (Hippocampus guttulatus) adult female in a meadow of (Zostera marina) seagrass. Studland Bay, Dorset, England, United Kingdom. English Channel, North East Atlantic Ocean.

David Perpinan / European eel (Anguilla anguilla) swimming in front of the camera at night, Barcelona, Spain, May.

Nick Upton / Brent goose (Branta bernicla) swimming in the sea just offshore to access Sea grass beds (Zostera marina) as they become exposed on a falling tide, Studland Bay, Dorset, UK, December.

Nick Upton / Brent goose (Branta bernicla) group swimming in the sea just offshore to access Sea grass beds (Zostera marina) as they become exposed on a falling tide with Old Harry's Rocks in the background, Studl...

Nick Upton / Brent goose (Branta bernicla) group swimming in the sea just offshore to access Sea grass beds (Zostera marina) as they become exposed on a falling tide with Old Harry's Rocks in the background, Studl...

Nick Upton / Brent goose (Branta bernicla) grazing Sea grass (Zostera marina) exposed on a sea shore as the tide falls, Studland Bay, Dorset, UK, December.

Nick Upton / Brent goose (Branta bernicla) grazing Sea grass (Zostera marina) exposed on a sea shore as the tide falls, Studland Bay, Dorset, UK, December.

Franco Banfi / Moray eel (Muraena helena) swimming away from Teti shipwreck which sank in a sorm on 23 May 1930, Komiza, Vis Island, Croatia, Adriatic Sea. July