A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A walrus sleeps on the slipway of Tenby Lifeboat station at Tenby, Wales, Britain, March 27, 2021. REUTERS/Rebecca Naden

A zookeeper wearing a protective face mask feeds a walrus at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

A zookeeper wearing a protective face mask feeds a walrus at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

A walrus eats at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

A walrus eats at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

A zookeeper wearing a protective face mask feeds a walrus at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

A zookeeper wearing a protective face mask feeds a walrus at Pairi Daiza wildlife park, a zoo and botanical garden in Brugelette, as Belgium began easing lockdown restrictions amid the coronavirus disease (COVID-19) outbreak, Belgium May 18, 2020. REUTERS/Francois Lenoir

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

A walrus swims in a compound in the Hagenbeck Zoo in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Unnamed Walrus calf born on May 5 in the Hagenbeck Zoo, dives in a compound as it is presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Polosa and her unnamed calf, born on May 5 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany May 23, 2019. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

Unnamed walrus calf, born on June 17, is seen in the Hagenbeck Zoo compound during presentation to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Walrus Dyna and her unnamed calf, born on June 17 in the Hagenbeck Zoo, dive in their compound as they are presented to the public in Hamburg, Germany August 3, 2018. REUTERS/Fabian Bimmer

Female walrus Polosa (L) and her 4-weeks old cualf, nameless until now, are pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer

Female walrus Polosa and her 4-weeks old calf, nameless until now, are pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer

Female walrus Polosa (R) and her 4-weeks old calf, nameless until now, are pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer

Female walrus Polosa and her 4-weeks old calf, nameless until now, are pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer

Female walrus Polosa is pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer

Female walrus Polosa and her 4-weeks old calf, nameless until now, are pictured in Hagenbecks zoo in Hamburg, Germany, July 2, 2015. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

"Red Walrus 2011", a red walrus made of dental composite resin, whiskers and brown glass eyes by Belgian artist Carsten Hoeller at the price of 90,000 Euros ($65,300) lies on the ground of the Art Cologne 2015 fair in Cologne April 15, 2015. Some 200 exhibitors from 23 countries are taking part in the 49th Art Cologne from April 16 to April 19, one of the world's leading fairs for progressive, post-war and contemporary art. REUTERS/Wolfgang Rattay

A man walks past "Red Walrus 2011", made of dental composite resin, whiskers and brown glass eyes by Belgian artist Carsten Hoeller at the price of 90,000 Euros (95,300 US dollars) during the Art Cologne 2015 fair in Cologne April 15, 2015. Some 200 exhibitors from 23 countries are taking part in the 49th Art Cologne from April 16 to April 19, one of the world's leading fairs for progressive, post-war and contemporary art. REUTERS/Wolfgang Rattay

Undergraduate seniors in Prof. Michael Gennert's lab describe their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE REUTERS/Dominick Reuter

Undergraduate seniors in Prof. Michael Gennert's lab replace the top cover of their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE REUTERS/Dominick Reuter

Undergraduate seniors in Prof. Michael Gennert's lab describe their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE REUTERS/Dominick Reuter

Undergraduate seniors in Prof. Michael Gennert's lab lift the top cover from their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE REUTERS/Dominick Reuter

Undergraduate seniors in Prof. Michael Gennert's lab reveal the interior electronics of their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE REUTERS/Dominick Reuter

Undergraduate seniors in Prof. Michael Gennert's lab describe their amphibious robot "Walrus" at Worcester Polytechnic Institute in Worcester, Massachusetts, March 20, 2015. The team will race their robot against other robots in a distance challenge in April on the streets of Cambridge, MA. Picture taken March 20, 2015. To match feature USA-ROBOTS/RACE
REUTERS/Dominick Reuter

A walrus looks out of its enclosure at an oceanarium at Russky Island in the far eastern city of Vladivostok, February 17, 2015. Prosecutors in Primorsky Krai last week launched an investigation into the death of at least six sea animals and fish at the local oceanarium where construction was stalled as a result of a corruption scandal, local media reported. The oceanarium was supposed to be completed by the time of the Asia Pacific Economic Cooperation forum in Vladivostok in September 2012. REUTERS/Yuri Maltsev (RUSSIA - Tags: ANIMALS BUSINESS CONSTRUCTION ENVIRONMENT SOCIETY)

German entertainer Ina Mueller smells a fish during a Christening ceremony of a walrus in Hagenbecks zoo in Hamburg, northern Germany on October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ENTERTAINMENT)

German entertainer Ina Mueller poses with 14-week old walrus calf 'Thor' and his mother Dyna, during Thor's Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

German entertainer Ina Mueller poses with 14-week old walrus calf 'Thor' during his Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

German entertainer Ina Mueller baptizes 14-week old walrus calf 'Thor', who sits next his mother Dyna (R) during a Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

Fourteen-week old walrus calf 'Thor' sits next to his mother Dyna, during his Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

German entertainer Ina Mueller poses with 14-week old walrus calf 'Thor' and his mother Dyna, during Thor's Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

German entertainer Ina Mueller poses with 14-week old walrus calf 'Thor' during his Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

German entertainer Ina Mueller poses with 14-week old walrus calf 'Thor' during his Christening ceremony in Hagenbecks zoo in Hamburg, northern Germany October 1, 2014. REUTERS/Fabian Bimmer (GERMANY - Tags: ANIMALS ENTERTAINMENT)

Some of the Lewis Chessmen, which are made from walrus ivory and whales' teeth and were discovered in 1831 on the Isle of Lewis in the Outer Hebrides, are pictured on display at the National Museum of Scotland in Edinburgh, Scotland April 30, 2014. Eleven of the ancient chess pieces dated from 1150-1200 AD, are kept at the National Museum of Scotland, and 82 are in the British Museum. Scottish separatists are closing the gap on their unionist rivals as a September independence referendum draws nearer, according to a poll. But pollster TNS said it would still be a "major task" for them to draw level in time. In a poll of 995 adults, TNS found that support for the pro-independence campaign had grown by two points to 32 percent compared with last month, while the campaign to reject independence had slipped back a point to 41 percent. In the run-up to the vote, Reuters photographer Suzanne Plunkett took a series of close-up pictures of food, drink and various objects typically associated with Scotland. Picture taken April 30, 2014. REUTERS/Suzanne Plunkett (BRITAIN - Tags: POLITICS SOCIETY)

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