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

Brais Seara Fernandez/ BIA / Atlantic Puffin (Fratercula arctica) with sandeel prey, Farne Islands, United Kingdom

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.

Roger Powell / Black Guillemot {Cepphus grylle} with Sandeel fish in beak trying to entice a female to his nest site, Caithness, Scotland, UK

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

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

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

Tony Wu / Korean sandlance (Hypoptychus dybowskii) embryos developing inside eggs, on Sargassum, close up. Hokkaido, Japan. May.

Tony Wu / Korean sandlance (Hypoptychus dybowskii) egg clusters on Sargassum (Sargassum horneri). Fish produce sticky secretion in kidneys that adheres eggs to Sargassum. Hokkaido, Japan. May.

Sue Daly / Shoal of Lesser sand eels (Ammodytes tobianus), Sark, British Channel Islands, UK, August.

Michael Milicia/ BIA / Atlantic Puffin (Fratercula arctica) flying with sandeel prey, Iceland

SCOTLAND: The Big Picture / Atlantic puffin (fratercula arctica) with Sand eels, amongst thrift, Fair Isle, Shetland, Scotland, UK, July.