Marine biologist Marina Benazic feeds Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Healthy Pinna nobilis, Mediterranean's largest clam on the verge of extinction, are seen in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

A woman looks at healthy Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Marine biologist Marina Benazic prepares food for Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Marine biologist Marina Benazic prepares food for Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Marine biologist Marina Benazic inspects food for Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Dead Pinna nobilis, Mediterranean's largest clam on the verge of extinction, are seen in Pula Aquarium, Pula, Croatia September 17, 2020. Picture taken September 17, 2020. REUTERS/Antonio Bronic

Healthy Pinna nobilis, Mediterranean's largest clam on the verge of extinction, are seen in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Dead Pinna nobilis, Mediterranean's largest clam on the verge of extinction, are seen in the Adriatic Sea near Pula, Croatia September 17, 2020. Picture taken September 17, 2020. REUTERS/Antonio Bronic

Marine biologist Marina Benazic feeds Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in Pula Aquarium, Pula, Croatia September 16, 2020. Picture taken September 16, 2020. REUTERS/Antonio Bronic

Worker of Pula Aquarium, Zoran Micic, is inspecting dead Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in the Adriatic Sea near Pula, Croatia September 17, 2020. Picture taken September 17, 2020. REUTERS/Antonio Bronic

Worker of Pula Aquarium, Zoran Micic, is inspecting dead Pinna nobilis, Mediterranean's largest clam on the verge of extinction, in the Adriatic Sea near Pula, Croatia September 17, 2020. Picture taken September 17, 2020. REUTERS/Antonio Bronic

A local resident Houise Babineaux, 59, who recently was injured after stepping on a clam shell, sits in the back of a pick up truck while awaiting to return to his residence in the aftermath of Hurricane Laura in Sulphur, Louisiana, U.S., August 27, 2020. REUTERS/Adrees Latif

People dig for clams in the shallow waters during Golden Week, a week-long holiday in Japan, under a nationwide state of emergency in Ichikawa, east of Tokyo, Japan April 27, 2020, as the spread of the coronavirus disease (COVID-19) continues. REUTERS/Issei Kato

People dig for clams in the shallow waters during Golden Week, a week-long holiday in Japan, under a nationwide state of emergency in Ichikawa, east of Tokyo, Japan April 27, 2020, as the spread of the coronavirus disease (COVID-19) continues. REUTERS/Issei Kato TPX IMAGES OF THE DAY

A woman and a child are seen in the shallow waters as people try to dig for clams during Golden Week, a week-long holiday in Japan, under a nationwide state of emergency in Ichikawa, east of Tokyo, Japan April 27, 2020, as the spread of the coronavirus disease (COVID-19) continues. REUTERS/Issei Kato

Greg Lewis, a fisherman, goes fishing on the Quinault River on the Quinault Indian Reservation in Taholah, Washington, U.S., March 4, 2020. ''This river is where I make most of my money. Besides that, I go clam digging and work a summer job too,'' Lewis said. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES.

A Quinault tribal member digs for clams on Pacific Beach, Washington, U.S. March 5, 2020. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES. TPX IMAGES OF THE DAY

Becca Ralston, a fisherwoman and jewellery designer, digs for clams on Pacific Beach, Washington, U.S., March 5, 2020. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES.

Becca Ralstonon, a fisherwoman and jewellery designer, digs for clams on Pacific Beach, Washington, U.S. March 5, 2020. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES.

A fish buyer weighs a bucket of clams that were caught on Pacific Beach, in Washington, U.S., March 5, 2020. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES.

Celina Markishtum, a fisherwoman, who is clam digging during the clam season, smokes a cigarette as she lies on her bed at her home in Quinault Indian Nation's main village, on the Quinault Indian Reservation in Taholah, Washington, U.S. March 6, 2020. ''Clam digging is just for Quinault tribal members, like my husband Stan, he's Micmac and he's not allowed to dig. I mean, we only get $2.50 for a pound so that's a lot of digging. Before we used to get as much as a whole 5 gallon bucket in a day but now we are lucky to get half that. Today, I think I made $15.'' said Markishtum. REUTERS/Stephanie Keith SEARCH ''QUINAULT CLIMATE CHANGE'' FOR THIS STORY. SEARCH ''WIDER IMAGE'' FOR ALL STORIES.

Migrants, who are seeking asylum in the U.S., harvest clam shells from Rio Grande river at an encampment of more than 2,000 migrants, as local authorities prepare to respond to the coronavirus disease (COVID-19) outbreak, in Matamoros, Mexico March 22, 2020. Picture taken March 22, 2020. REUTERS/Go Nakamura

Carmen Gray talks through a window to her mother, Susan Hailey, 76, who is a resident at Life Care Center of Kirkland, the long-term care facility linked to confirmed coronavirus cases in the state, during the coronavirus disease (COVID-19) outbreak, after bringing her a lunch of clam chowder at the Life Care Center of Kirkland in Kirkland, Washington, U.S. March 18, 2020. REUTERS/David Ryder

Carmen Gray shows a bag containing a lunch of clam chowder that she brought for her mother, Susan Hailey, 76, who is a resident at Life Care Center of Kirkland, the long-term care facility linked to confirmed coronavirus cases in the state, during the coronavirus disease (COVID-19) outbreak, while greeting her mother through a window at the Life Care Center of Kirkland in Kirkland, Washington, U.S. March 18, 2020. REUTERS/David Ryder

Carmen Gray buys a lunch of clam chowder to bring to her mother, Susan Hailey, 76, who is a resident at Life Care Center of Kirkland, the long-term care facility linked to confirmed coronavirus cases in the state, during the coronavirus disease (COVID-19) outbreak, in Kirkland, Washington, U.S. March 18, 2020. REUTERS/David Ryder

Carmen Gray delivers a lunch of clam chowder for her mother, Susan Hailey, 76, who is a resident at Life Care Center of Kirkland, the long-term care facility linked to confirmed coronavirus cases in the state, during the coronavirus disease (COVID-19) outbreak, at the Life Care Center of Kirkland in Kirkland, Washington, U.S. March 18, 2020. REUTERS/David Ryder

An old pillbox stands in a clam farm in Yunlin, Taiwain, January 6, 2020. REUTERS/Ann Wang SEARCH "TAIWAN BUNKER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A clam vendor prepares her stall in a fish market in Taoyuan, Taiwan December 27, 2019. REUTERS/Ann Wang

The clam-shell hood of a 2019 Chevrolet Silverado 6500 HD Chassis Cab truck is shown with tilt engine cover in Flint, Michigan, U.S., October 17, 2018. Picture taken on October 17, 2018. REUTERS/Rebecca Cook

The clam-shell hood of a 2019 Chevrolet Silverado 6500 HD Chassis Cab truck is shown with tilt engine cover in Flint, Michigan, U.S., October 17, 2018. Picture taken on October 17, 2018. REUTERS/Rebecca Cook

An open mussel shell in the west of Norway, July 31, 2018. Picture taken July 31, 2018. To match Special Report OCEANS-TIDE/FUTURE REUTERS/Clodagh Kilcoyne

Little neck clams are displayed for customers at St. Lawrence Market South in Toronto, Ontario, Canada September 27, 2018. REUTERS/Chris Helgren

The sun rises as fishermen seek clams and bait in Pemba, Mozambique, July 12, 2018. Picture taken July 12, 2018. REUTERS/Mike Hutchings

The sun rises as fishermen gather clams and bait in Pemba, Mozambique, July 12, 2018. Picture taken July 12, 2018. REUTERS/Mike Hutchings

A waiter delivers a lunch of lobster, that was imported from Boston, U.S., at a sea food restaurant in Beijing, China July 5, 2018. Picture taken July 5, 2018. REUTERS/Jason Lee

A retailer picks out clams from a pile at the seafood section of a fish market in Beijing, China, June 27, 2018. Picture taken June 27, 2018. REUTERS/Thomas Peter TPX IMAGES OF THE DAY

A retailer picks out clams from a pile at the seafood section of a fish market in Beijing, China, June 27, 2018. Picture taken June 27, 2018. REUTERS/Thomas Peter

A woman weighs clams at the seafood section of a fish market in Beijing, China, June 27, 2018. Picture taken June 27, 2018. REUTERS/Thomas Peter

A model poses with a clam shell shaped clutch purse at the eighth annual amfAR Gala Sao Paulo in Sao Paulo, Brazil April 13, 2018. REUTERS/Paulo Whitaker

A worker climbs a ladder as he carries clam shells to be loaded onto a truck, on the banks of Murinjapuzha River on the outskirts of Kochi, India, November 14, 2017. REUTERS/Sivaram V TPX IMAGES OF THE DAY

A worker climbs a ladder as he carries clam shells to be loaded onto a truck, on the banks of Murinjapuzha River on the outskirts of Kochi, India, November 14, 2017. REUTERS/Sivaram V

Turi Rando, a member of Ganzirri lake cooperative poses with clams in Messina, Italy July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Turi Rando, a member of Ganzirri lake cooperative, selects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Turi Rando, a member of Ganzirri lake cooperative, shows clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

A member of Ganzirri lake cooperative collects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

A member of Ganzirri lake cooperative collects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Nino Arena, a member of Ganzirri lake cooperative, selects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Nino Arena, a member of Ganzirri lake cooperative, collects clams in Messina, Italy July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Nino Arena, a member of Ganzirri lake cooperative, collects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

A view of Ganzirri lake in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

A member of Ganzirri lake cooperative collects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Turi Rando, a member of Ganzirri lake cooperative, selects clams in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Clams are seen at Ganzirri lake in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

A view of Ganzirri lake in Messina, Italy, July 7, 2017. Picture taken July 7, 2017. REUTERS/Antonio Parrinello

Mak Sobin, 25, sells freshwater clams while disguising himself as an old Khmer theater character to get attention from his costumers in Phnom Penh, Cambodia, March 13, 2017. REUTERS/Samrang Pring

Mak Sobin, 25, sells freshwater clams while disguising himself as an old Khmer theater character to get attention from his costumers in Phnom Penh, Cambodia, March 13, 2017. REUTERS/Samrang Pring

Mak Sobin, 25, sells freshwater clams while disguising himself as an old Khmer theater character to get attention from his costumers in Phnom Penh, Cambodia, March 13, 2017. REUTERS/Samrang Pring

Mak Sobin, 25, sells freshwater clams while disguising himself as an old Khmer theater character to get attention from his costumers in Phnom Penh, Cambodia, March 13, 2017. REUTERS/Samrang Pring

Mak Sobin, 25, sells freshwater clams while disguising himself as an old Khmer theater character to get attention from his costumers in Phnom Penh, Cambodia, March 13, 2017. REUTERS/Samrang Pring