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

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

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.

Duncan Usher / Sandwich Tern (Thalasseus sandvicensis) flying with sand eel in beak, Texel, Holland

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.

Juergen Freund / Clown / Napoleon snake eel (Ophichthus bonaparti) emerging from sand, Batangas, Philippines.

Pete Oxford / Galapagos garden eels (Heteroconger / Taenioconger klausewitzi) on seabed, Galapagos Islands

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