Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas

Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas TPX IMAGES OF THE DAY

Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas

Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas

Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas

Sea-surface-cleaning vessels and barrier-laying boats of Istanbul Municipality clean up the sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 15, 2021. Picture taken with a drone. REUTERS/Umit Bektas

Sea ice physicist and expedition participant Stefanie Arndt, atmospheric physicist and leader of the MOSAiC expedition Markus Rex and Germany's Minister for Education and Research Anja Karliczek pose with a placard showing a picture of the German icebreaker and research vessel "Polarstern" and a text reading 'Global Temperature rise' before a news conference presenting the initial results of the MOSAiC expedition, the largest scientific undertaking in the polar region to date, in Berlin, Germany June 15, 2021. John MacDougall/Pool via REUTERS

Sea ice physicist and expedition participant Stefanie Arndt, atmospheric physicist and leader of the MOSAiC expedition Markus Rex and Germany's Minister for Education and Research Anja Karliczek pose with a placard showing a picture of the German icebreaker and research vessel "Polarstern" and a text reading 'Global Temperature rise' before a news conference presenting the initial results of the MOSAiC expedition, the largest scientific undertaking in the polar region to date, in Berlin, Germany June 15, 2021. John MacDougall/Pool via REUTERS

Captain Tyutkalo Vitaly, skipper of the MV X-Press Pearl vessel which caught fire and sank while being towed, leaves the court room after being released on a personal bond while travel ban has been imposed for him in Colombo, Sri Lanka June 14, 2021. REUTERS/Dinuka Liyanawatte

Captain Tyutkalo Vitaly, skipper of the MV X-Press Pearl vessel which caught fire and sank while being towed, arrives at the court room in Colombo, Sri Lanka June 14, 2021. REUTERS/Dinuka Liyanawatte

Captain Tyutkalo Vitaly, skipper of the MV X-Press Pearl vessel which caught fire and sank while being towed, leaves the court room after being released on a personal bond while travel ban has been imposed for him in Colombo, Sri Lanka June 14, 2021. REUTERS/Dinuka Liyanawatte

Police officers look at a navy vessel in St Ives Harbour, during the G7 summit in Cornwall, Britain, June 13, 2021. REUTERS/Tom Nicholson

A navy vessel is seen next to the Island in St Ives, during the G7 summit in Cornwall, Britain, June 13, 2021. REUTERS/Tom Nicholson

A commercial vessel sails through Marmara Sea covered by sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, in Istanbul, Turkey June 12, 2021. REUTERS/Umit Bektas

A police vessel patrols Carbis Bay, on the sidelines of G7 summit in Cornwall, Britain, June 11, 2021. REUTERS/Tom Nicholson

A woman exercises with the Spanish vessel Angeles Alvarino seen in the background as it carries out a search operation to try to locate a second missing girl and her father, near the coast of the Spanish island of Tenerife, Spain, June 11, 2021. REUTERS//Borja Suarez

People watch as the Spanish vessel Angeles Alvarino carries out a search operation to try to locate a second missing girl and her father, near the coast of the Spanish island of Tenerife, Spain, June 11, 2021. REUTERS//Borja Suarez

The Spanish vessel Angeles Alvarino carries out a search operation to try to locate a second missing girl and her father, near the coast of the Spanish island of Tenerife, Spain, June 11, 2021. REUTERS//Borja Suarez

The HMS Tamar patrol vessel of the British Royal Navy is seen during the G7 summit in Carbis Bay, Cornwall, Britain, June 11, 2021. REUTERS/Phil Noble/Pool

Royal Navy vessel sails near Carbis Bay ahead of the G7 summit, Cornwall, Britain, June 8, 2021. REUTERS/Tom Nicholson

A migrant talks to a nurse while waiting to be disembarked from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 8, 2021. REUTERS/Borja Suarez

A migrant disembarks from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 8, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 8, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 8, 2021. REUTERS/Borja Suarez

Aerial view of cleaning vessels and boats sailing through the sea covered with a plague of sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spreading through the Sea of Marmara and posing a threat to marine life and the fishing industry, on the shores of Istanbul, Turkey June 8, 2021. Picture taken with a drone. REUTERS/Mehmet Caliskan

Cleaning vessels and a coast guard boat sail through the sea covered with a plague of sea snot, a thick slimy layer of the organic matter also known as marine mucilage, spread through the Sea of Marmara and which poses a threat to marine life and the fishing industry, on the shores of Istanbul, Turkey June 8, 2021. REUTERS/Umit Bektas

A surfer catches a wave in front of a naval vessel in St Ives Bay, ahead of the G7 summit, in Cornwall, Britain, June 8, 2021. REUTERS/Tom Nicholson

A naval vessel passes Godrevy lighthouse near Carbis Bay, ahead of the G7 summit, in Cornwall, Britain, June 8, 2021. REUTERS/Tom Nicholson

Naval vessels are moored in St Ives Bay, ahead of the G7 summit, in Cornwall, Britain, June 8, 2021. REUTERS/Tom Nicholson

Rescuers help a migrant child disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 4, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 4, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 4, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain June 4, 2021. REUTERS/Borja Suarez

The MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour in Sri Lanka June 4, 2021. REUTERS/Dinuka Liyanawatte

Refugees and migrants make their way in the Mavrovouni camp as a Greek Navy and a Greek Coastguard vessel patrol off the island of Lesbos, Greece, June 3, 2021. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY

The MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour, as seen from a coastal area in Ja-Ela, in Sri Lanka June 2, 2021. REUTERS/Dinuka Liyanawatte REFILE - QUALITY REPEAT

A boy uses his phone as the MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour, as seen from a coastal area in Ja-Ela, in Sri Lanka June 2, 2021. REUTERS/Dinuka Liyanawatte REFILE - QUALITY REPEAT

The MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour, as seen from a coastal area in Ja-Ela, in Sri Lanka June 2, 2021. REUTERS/Dinuka Liyanawatte

The MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour as another container ship sails next to it, seen from a coastal area in Ja-Ela, in Sri Lanka June 2, 2021. REUTERS/Dinuka Liyanawatte

The MV X-Press Pearl vessel sinks while being towed into deep sea off the Colombo Harbour, seen from a coastal area in Ja-Ela, in Sri Lanka June 2, 2021. REUTERS/Dinuka Liyanawatte

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 28, 2021. REUTERS/Borja Suarez

People look as the debris of cargos spilled from MV X-Press Pearl container ship which caught fire in the seas off the Colombo Harbour in Ja-Ela, Sri Lanka May 26, 2021. REUTERS/Dinuka Liyanawatte

Emily Funk, an associate specialist at the University of California Davis, waits for a fluorescent reader to finish running a SHERLOCK test that will determine the exact species of a Chinook salmon while on a research vessel on the San Joaquin River off Antioch, California, U.S., May 25, 2021. Picture taken May 25, 2021. REUTERS/Nathan Frandin

Emily Funk, an associate specialist at the University of California Davis, collects a mucus sample from a Chinook salmon to determine its exact species while on a research vessel on the San Joaquin River off Antioch, California, U.S., May 25, 2021. Picture taken May 25, 2021. REUTERS/Nathan Frandino

Researchers Melinda Baerwald (left) and Andrea Schreier (center) stand at the stern of a research vessel on the San Joaquin River off Antioch, California, U.S., May 25, 2021. Picture taken May 25, 2021. REUTERS/Nathan Frandino

A florescent reader runs a SHERLOCK test on a research vessel on the San Joaquin River off Antioch, California, U.S., May 25, 2021. Picture taken May 25, 2021. REUTERS/Nathan Frandino

A migrant waits to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel in the port of Arguineguin, on the island of Gran Canaria, Spain May 23, 2021. REUTERS/Borja Suarez

The Stril Explorer, an offshore survey and ROV vessel, enters New York Harbor as seen from Brooklyn, New York, U.S., May 20, 2021. REUTERS/Brendan McDermid

Israeli navy vessels patrol near a natural gas rig off Israel's southern Mediterranean coast, amid heavy fighting with Palestinian militants in the Gaza Strip, as it is seen from Ashkelon, Israel May 17, 2021 REUTERS/ Amir Cohen

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, on the island of Gran Canaria, Spain May 16, 2021. REUTERS/Borja Suarez