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

Andy Trowbridge / Puffin (Fratercula arctica) in flight, with beak full of sand eels. Fair Island, Shetland Islands, Scotland, 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 / Puffin (Fratercula arctica) sitting on Sea thrift (Armeria maritima) with 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 / School of Lesser sand eels (Ammodytes tobianus) swimming over an Eelgrass (Zostera marina) meadow in shallow water. Swanage, Dorset, UK. English Channel. July.

Alex Mustard / Shoal of Lesser sandeels (Ammodytes tobianus) swims through thongweed (Himanthalia elongata) and sunbeams. Falmouth, Cornwall, England, United Kingdom. British Isles. 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 / Shoal of lesser sandeels (Ammodytes tobianus) swims through thongweed (Himanthalia elongata) and sunbeams. Falmouth, Cornwall, England, United Kingdom. North East Atlantic Ocean.

Chris Shields / Illustration of Lesser sandeel (Ammodytes tobianus)

Chris Shields / Illustration of Greater sandeel (Hyperoplus lanceolatus)

David Hall / Thousands of Pacific Sandlance (Ammodytes hexapterus) swim overhead, as a few rockfish (Sebastes sp.) swim in the distance. Seven Tree Island, Browning Pass, Queen Charlotte Strait, British Columbia,...

Terry Whittaker / Puffin (Fratercula arctica) bringing Lesser sandeels (Ammodytes tobianus) back to burrow. Grimsey Island, Iceland, July

Terry Whittaker / Puffin (Fratercula arctica) bringing lesser sandeels ( Ammodytes tobianus) back to burrow. Grimsey Island, Iceland, July

Terry Whittaker / RF - Razorbill (Alca torda) adult with sandeels. Grimsey Island, Iceland (This image may be licensed either as rights managed or royalty free.)

Terry Whittaker / RF - Puffin (Fratercula arctica) bringing lesser sandeels ( Ammodytes tobianus) back to burrow. Grimsey Island, Iceland, July (This image may be licensed either as rights managed or royalty free.)

Nick Hawkins / Sand lance (Ammodytes americanus) large shoal of fish, coastal shallows, south shore of Nova Scotia, Canada, July.

Nick Hawkins / American sandlance (Ammodytes americanus) school in shallow waters, Borgle's Island, Nova Scotia, Canada, September.

Nick Hawkins / American sandlance (Ammodytes americanus) school in shallow waters, Borgle's Island, Nova Scotia, Canada, September.

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

Brent Stephenson / Atlantic puffin (Fratercula arctica) flying with a beak full of Sand eels (Ammodytidae sp) Vigur Island, Isafjardardjup, Iceland, July.

Brent Stephenson / Atlantic puffin (Fratercula arctica) flying towards burrow with beakful of sandeels (Ammodytidae) Vigur Island, Isafjardardjup, Iceland. July.

Brent Stephenson / Atlantic puffin (Fratercula arctica) standing on a rock on the edge of the nesting cliff, with a beakful of sandeels (Ammodytidae). Flannan Isles, Outer Hebrides, Scotland. July.

Alex Hyde / Lesser Sand Eel (Ammodytes marinus) photographed in mobile field studio against a white background. Isle of Mull, Scotland, UK. June.

Andy Trowbridge / Puffin (Fratercula arctica) walking across flowering Sea thrift (Armeria maritima) with beak full of sand eels. Fair Island, Shetland Islands, Scotland, July.

Andy Trowbridge / Puffin (Fratercula arctica) in flight, with beak full of sand eels. Fair Island, Shetland Islands, Scotland, July.

Andy Trowbridge / Puffin (Fratercula arctica) in flight, with beak full of sand eels. Fair Island, Shetland Islands, Scotland, July.

Andy Trowbridge / Puffin (Fratercula arctica) in flight, with beak full of sand eels. Fair Island, Shetland Islands, Scotland, July.

Andy Trowbridge / RF- Atlantic Puffin (Fratercula arctica) in flight, coming into land with beak full of sand eels (Ammodytes tobianus). Fair Isle, Shetland Islands, Scotland, UK, July. (This image may be licensed eith...

Andy Trowbridge / RF- Atlantic Puffin (Fratercula arctica) with beak full of Sand eels (Ammodytes tobianus) portrait. Fair Isle, Shetland Islands, Scotland, UK, July. (This image may be licensed either as rights manage...

Alex Mustard / Atlantic puffins (Fratercula arctica) perched on a rock, one has a beak filled with sand eels (Ammodytes marinus). Farne Islands, Northumberland, England, UK. North Sea.

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Yva Momatiuk & John Eastcott / Atlantic Puffin (Fratercula arctica) portrait of adult holding Sand Lance (Ammodytes sp) in beak to feed chick in burrow, summer breeding season, Newfoundland, Canada

Scott Leslie / Sand Lance (Ammodytes sp) group swimming, Nova Scotia, Canada

Scott Leslie / Sand Lance (Ammodytes sp) group swimming, Nova Scotia, Canada