Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Buoys help identify separate fisheries farming mussels and oysters at an aquaculture project in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

A worker cleans oysters farmed at an aquaculture project in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft collect farmed mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Buoys help identify separate fisheries farming mussels and oysters at an aquaculture project in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

A worker collects farmed mussels and oysters aboard an aquaculture raft in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

Workers aboard an aquaculture raft sort mussels and oysters in Saldanha Bay near Cape Town, South Africa, June 15, 2021. Picture taken June 15, 2021. REUTERS/Mike Hutchings

People watch the sunset in front of an oyster farm in Tainan, Taiwan, April 30, 2021. REUTERS/Ann Wang

The Sun sets at an oyster farm in Tainan, Taiwan, April 30, 2021. REUTERS/Ann Wang

Australian oyster farmer and co-owner of Harpers Oysters, Brett Harper, stands in his oyster shed yard near oyster trays after raging floodwaters decimated his business, in Dunbogan, Australia March 30, 2021. Picture taken March 30, 2021. REUTERS/Stefica Nicol Bikes

Australian oyster farmer and co-owner of Harpers Oysters, Brett Harper, stands in his oyster shed yard near oyster trays after raging floodwaters decimated his business, in Dunbogan, Australia March 30, 2021. Picture taken March 30, 2021. REUTERS/Stefica Nicol Bikes

Kim Si-young, 66, cooks oysters for siblings Lyoo Chan-hee, 10, and Lyoo Chae-hee, 7, on Nokdo island in Boryeong, South Korea, February 28, 2021. "I cried so much (when the island school closed in 2006)," said Kim. "I want to protect Nokdo but it's depressing to see fewer and fewer people here." REUTERS/Kim Hong-Ji SEARCH "NOKDO AGEING " FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Kim Si-young, 66, cooks oysters on Nokdo island in Boryeong, South Korea, February 27, 2021. "When we went for (national service) military training some of us used to undergo vasectomy to curb population growth," said Kim. "Some got their wives to get it done." REUTERS/Kim Hong-Ji SEARCH "NOKDO AGEING " FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An oyster fisherman Adam Spargo dredges for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

An oyster fisherman Adam Spargo walks up the Mylor Harbour jetty, after dredging for oysters in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

An oyster fisherman Adam Spargo dredges for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Oyster fisherman Adam Spargo sails on his traditional, sail-powered boat "Mistress" whilst dredging for oysters in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

An oyster fisherman Adam Spargo adjusts the sails on his traditional, sail-powered boat "Mistress", after dredging for oysters in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Oyster fisherman Adam Spargo dredges for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

An oyster fisherman Adam Spargo speaks to a shellfish exporter on the phone after dredging for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Oyster fisherman Adam Spargo measures an oyster using a tool on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

An oyster measuring tool and bucket of oysters on Adam Spargo's traditional, sail-powered boat "Mistress", in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Oyster fisherman Adam Spargo fixes a hole in an oyster dredging basket, in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson.

Oyster fisherman Adam Spargo tips a bucket of oysters into a bag on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson.

Oyster fisherman Adam Spargo dredges for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Oyster fisherman Adam Spargo dredges for oysters on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

A traditional, sail-powered oyster fishing boat dredges for oysters in the Fal Estuary, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Martin Laity, director of Sailors Creek Shellfish, a shellfish exporter, shows oysters caught from the Fal Estuary, that are being purified in tanks before being exported, in Flushing, Cornwall, Britain, December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson.

An oyster fisherman Adam Spargo cuts open a queen scallop on his traditional, sail-powered boat "Mistress" in the Fal Estuary, Cornwall, Britain December 30, 2020. Picture taken December 30, 2020. REUTERS/Tom Nicholson

Bags of oysters are seen in a tank at Hog Island Oyster Co. in Marshall, California, U.S., May 22, 2020. The company has kept a skeleton crew onsite to maintain its oyster farm amid the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

A bag of oysters is seen at Hog Island Oyster Co. in Marshall, California, U.S., May 22, 2020. The company has kept a skeleton crew onsite to maintain its oyster farm amid the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

A customer picks up an order of oysters at Hog Island Oyster Co. in Marshall, California, U.S., May 22, 2020. The company is selling directly to consumers as many of its restaurants had to shut down due to the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Terry Sawyer (R), Hog Island Oyster Co. co-founder and Cesar Bernal, farm operations manager, prepare to head out on a boat to one of the company's farm plots on Tomales Bay in Marshall, California, U.S., May 22, 2020. The company has kept a skeleton crew onsite to maintain its oyster farm amid the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Terry Sawyer, Hog Island Oyster Co. co-founder sifts through juvenile virginica oysters taken from one of the company's farm plots in Tomales Bay in Marshall, California, U.S., May 22, 2020. The company has kept a skeleton crew onsite to maintain its oyster farm amid the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Terry Sawyer, co-founder of Hog Island Oyster Co., looks out over Tomales Bay in Marshall, California, U.S., May 22, 2020. The company has kept a skeleton crew onsite to maintain its oyster farm amid the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Customers wait for an order of oysters at Hog Island Oyster Co. in Marshall, California, U.S., May 22, 2020. The company is selling directly to consumers as many of its restaurants had to shut down due to the coronavirus pandemic. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Customers wait to place orders for oysters at Hog Island Oyster Co. in Marshall, California, U.S., May 22, 2020. With many of Hog Island's restaurants and its client restaurants shut down due to the coronavirus pandemic, customers have had to go directly to the company to buy their oysters. Picture taken May 22, 2020. REUTERS/Nathan Frandino

Candles burn in front of a religious shrine at the home of Emiliana Ponce, during the coronavirus disease (COVID-19) outbreak, in Buena Vista, Ecuador, April 21, 2020. Ponce, who suffers from liver problems and has not seen a doctor in two months due to the high demand of medical services related to COVID-19, is cared for by her daughter Esperanza Chalen Ponce. Her granddaughter Angela Chalen, who lives by collecting crab and oyster said: "We are unprotected because the doctors have not come down for two months. They must be working in Guayaquil by now." REUTERS/Santiago Arcos SEARCH "RURAL ECUADOR COVID-19" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Emiliana Ponce, 83, poses for a photograph as she sits in her home, during the coronavirus disease (COVID-19) outbreak, in Buena Vista, Ecuador, April 21, 2020. Ponce, who suffers from liver problems and has not seen a doctor in two months due to the high demand of medical services related to COVID-19, is cared for by her daughter Esperanza Chalen Ponce. Her granddaughter Angela Chalen, who lives by collecting crab and oyster said: "We are unprotected because the doctors have not come down for two months. They must be working in Guayaquil by now." REUTERS/Santiago Arcos SEARCH "RURAL ECUADOR COVID-19" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A plate of fresh oysters is pictured on a table in Mali Ston, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

Oyster producer Zdravko Lazic inspects oysters from a boat at his farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

Oyster producer Zdravko Lazic drives a boat at an oyster farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

Oyster producer Zdravko Lazic drives a boat at an oyster farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

An underwater view of an oyster farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

Oyster producer Zdravko Lazic inspects oysters at his farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic TPX IMAGES OF THE DAY

An underwater view of an oyster farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

An underwater view of an oyster farm in Brijesta, Croatia, May 10, 2020. Picture taken May 10, 2020. REUTERS/Antonio Bronic

Dr Greg Gulbransen performs a routine checkup with a baby while maintaining visits with both his regular patients and those confirmed to have the coronavirus disease (COVID19) at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen takes part in a telemedicine call with a patient while maintaining visits with both his regular patients and those confirmed to have the coronavirus disease (COVID-19) at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen performs a medical checkup on a 72-year-old man with Leukemia who is presumed to have the coronavirus disease (COVID-19) while at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen dons personal protective gear for a home call with a patient who had earlier been confirmed to have the coronavirus disease (COVID-19) as he maintains visits with both his regular patients and those with the virus in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen takes part in a telemedicine call with a patient while maintaining visits with both his regular patients and those confirmed to have the coronavirus disease (COVID-19) at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson TPX IMAGES OF THE DAY

Dr Greg Gulbransen takes part in a telemedicine call with a patient while maintaining visits with both his regular patients and those confirmed to have the coronavirus disease (COVID-19) at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen performs a follow up visit on a baby whose family had tested positive for the coronavirus disease (COVID-19) in early March while at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson

Dr Greg Gulbransen gestures to a toddler after a checkup for his daughter while maintaining visits with both his regular patients and those confirmed to have the coronavirus disease (COVID-19) at his pediatric practice in Oyster Bay, New York, U.S., April 13, 2020. Picture taken April 13, 2020. REUTERS/Lucas Jackson