Alex Mustard / 2020VISION / Grey seal (Halichoerus grypus) swimming amongst kelp, Farne Islands, Northumberland, England, UK, August. 2020VISION Book Plate. Did you know? The 1914 Grey Seal Protection Act ensured this species’ s...

Nick Hawkins / Grey seal (Halichoerus grypus) opening mouth close up off Bonaventure Island, Gulf of Saint Lawrence, Quebec, Canada. September.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) pup on a breeding beach, Orkney, Scotland, UK, April.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) huge group hauled out on a beach, Island of Mingulay, west coast of Scotland. May.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) using freshwater pools along the shore line and in the adjacent fields as place to learn to swim, Orkney, Scotland, UK, April.

SCOTLAND: The Big Picture / Young grey seal pup (Halichoerus grypus) recently born on a beach in Orkney, Scotland, UK, April.

David Tipling / Grey seal (Halichoerus grypus) female in surf, Horsey, Norfolk, England, UK, February.

David Tipling / Grey seal (Halichoerus grypus) pup, Horsey, Norfolk, England, UK, February.

Guy Edwardes / Grey Seal (Halichoerus grypus) playing in waves at Donna Nook, Lincolnshire, England, UK, January.

Guy Edwardes / Grey seals (Halichoerus grypus) females playing on beach at Donna Nook, Lincolnshire, England, UK, January

Guy Edwardes / Grey Seal (Halichoerus grypus) pup on beach at Donna Nook, Lincolnshire, England, UK, January.

Five Films / Female Grey seal (Halichoerus grypus) defending pup on beach, chasing male away, Horsey, Norfolk, November.

Dave Bevan / Two male Grey seals (Halichoerus grypus) fighting in surf, with a female and juvenile nearby, Norfolk, England, UK. December.

Dave Bevan / Grey seal (Halichoerus grypus) pup sheltering amongst sand dunes and Maram grass (Ammophila) whilst its mother is away feeding, Norfolk, England, UK. December.

Dave Bevan / Pair of Grey seals (Halichoerus grypus) mating on a beach, Norfolk, England, UK. December.

Dave Bevan / Pair of Grey seals (Halichoerus grypus) mating on a beach, Norfolk, England, UK. December.

Dave Bevan / Juvenile Herring gull (Larus argentatus) pecking a suckling Grey seal (Halichoerus grypus) pup, Norfolk, England, UK. December.

Dave Bevan / Grey seal (Halichoerus grypus) pup playing with a small piece of wood on a beach, Norfolk, England, UK. December.

Alex Mustard / Grey seal (Halichoerus grypus) split level of young seal investigating the camera with its nose and whiskers, close to shore. Lundy Island, Devon, UK, Bristol Channel. August

Alex Mustard / Grey seal (Halichoerus grypus) young female opens her mouth and blows bubbles through her nose playfully while she looks up from the seabed. Lundy Island, Devon, UK, Bristol Channel. August. Highly co...

Alex Mustard / Grey seal (Halichoerus grypus) young seal silhouetted against the sun as it dives after breathing, Lundy Island, Devon, UK, Bristol Channel, August

Alex Mustard / Grey seal (Halichoerus grypus) playful young seal above a kelp forest. Lundy Island, Devon, UK Bristol Channel, August

Alex Mustard / Grey seal (Halichoerus grypus) split level view of young investigating camera lens, Lundy Island, Devon, UK, Bristol Channel, August

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) swimming towards camera, Orkney, Scotland, UK, August.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) swimming over kelp forest, Shetland, Scotland, UK, August.

Dave Bevan / Grey seal (Halichoerus grypus) pup trying to suckle, Norfolk, England, UK, January.

Nick Upton / Rescued Grey seal pup (Halichoerus grypus) in a convalescence pool where it will be kept until strong enough to be released back to the sea, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January.

Nick Upton / Blind adult male Grey seal (Halichoerus grypus) 'Marlin' waving a flipper at the edge of a convalescence pool where he is a long-term resident, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January. Mo...

SCOTLAND: The Big Picture / Grey seals (Halochoerus grypus) hauled out along the banks of the Ythan Estuary, agiatated, Aberdeenshire, Scotland, UK, February.

Olga Kamenskaya / Young Baikal seal (Pusa sibirica) at breathing hole. Lake Baikal, Russia, April.

Olga Kamenskaya / Young Baikal seal (Pusa sibirica) at breathing hole. Lake Baikal, Russia, April.

Nick Upton / Grey seal (Halichoerus grypus) pup aged one month, rubbing its head with its flipper, yawning and settling down to rest on a sandy beach, Norfolk, England, UK, January.

Andy Trowbridge / Grey Seal (Halichoerus grypus) at rest on submerged rock, head and one flipper above water. Shetland Islands, Scotland, UK. July.

Nick Upton / Grey seal (Halichoerus grypus) pup resting on a sandy beach, stretching and rubbing its head with its flipper, Norfolk, England, UK, January.

David Tipling / Visitors viewing Grey Seal colony at Winterton Dunes, Norfolk, December 2010

Benjamin Barthelemy,Benjamin Barthelemy / Grey seal (Halichoerus grypus) hauled out on a beach at sunrise, Donna Nook Lincolnshire Wildlife Trust Reserve, Lincolnshire, England, UK, January.

Alex Mustard / 2020VISION / Old male Grey seal (Halichoerus grypus) with mouth wide open showing worn teeth, Lundy Island, Bristol Channel, England, UK, May. 2020VISION Book Plate. Did you know? Grey seals have double in populat...

Alex Mustard / 2020VISION / Grey seal (Halichoerus grypus) peering around kelp to investigate, Lundy Island, Bristol Channel, England, UK, May

Alex Mustard / 2020VISION / Grey seal (Halichoerus grypus) shows its teeth in a playful moment, Lundy Island, Bristol Channel, England, UK, May

Alex Mustard / 2020VISION / Grey seal (Halichoerus grypus) portrait underwater, Farne Islands, Northumberland, England, UK, August

Alex Mustard / 2020VISION / Grey seal (Halichoerus grypus) portrait underwater, amongst kelp. Farne Islands, Northumberland, England, UK, August

Fergus Gill / Grey seal pup (Halichoerus grypus) sleeping on a windswept beach. Scotland, Nov

Fergus Gill / Grey seal (Halichoerus grypus) couple fighting as the male (right) tries to mate with the female. Scotland, October .

Alex Mustard / A young Grey Seal (Halichoerus grypus) above kelp in the Farne Islands. This seal has an orange snout from foraging on a rusty ship wreck. Northumberland, England, UK. North Sea. August

Alex Mustard / A young Harbour / Common seal (Phoca vitulina) Lundy Island, Devon, England, UK. Bristol Channel, North East Atlantic Ocean. July

Alex Mustard / Female Grey seal (Halichoerus grypus) startled. Lundy Island, Devon, England, UK.

Alex Mustard / Female Grey seal (Halichoerus grypus) tangled in a discarded fishing net, Lundy Island, Devon, England, UK, July 2010.

Alex Mustard / Female Grey seal (Halichoerus grypus) approaching a snorkeller's fins, Lundy Island, Devon, England, UK, North East Altantic Ocean. July 2010. Model released