Marine biologists Chris Lowe PhD looks out over the ocean for sharks as their Shark Lab team from Cal State Long Beach work on a study of the animals in Del Mar, California, U.S., July 15, 2020. Picture taken July 15, 2020. REUTERS/Mike Blake

Marine biologists Chris Lowe PhD (L) and Jack May III (R) keep watch as fellow biologist Patrick Rex flies a drone over the ocean looking for sharks as their Shark Lab team from Cal State Long Beach work on a study of the animals in Del Mar, California, U.S., July 15, 2020. Picture taken July 15, 2020. REUTERS/Mike Blake

Marine biologists Chris Lowe PhD (L) retrieves an incoming drone as his Shark Lab team from Cal State Long Beach work on a study of the animals in Del Mar, California, U.S., July 15, 2020. Picture taken July 15, 2020. REUTERS/Mike Blake

Marine biologists Chris Lowe PhD (R) and Patrick Rex (L) fly a drone over the ocean looking for sharks as their Shark Lab team from Cal State Long Beach work on a study of the animals in Del Mar, California, U.S., July 15, 2020. Picture taken July 15, 2020. REUTERS/Mike Blake

REFILE - SPECIFYING DESIGNATION U.S. Marines look at wild animals being barbecued during the Cobra Gold multilateral military exercise in Chonburi, Thailand March 4, 2020. REUTERS/Soe Zeya Tun

Crabs are seen at the fish market in Washington, U.S., November 17, 2019. REUTERS/Yara Nardi

A view of tropical fish and crabs in plastic bags on display for sale in Hong Kong, China, October 25, 2019. REUTERS/Umit Bektas

A view of tropical fish and crabs in plastic bags on display for sale in Hong Kong, China, October 25, 2019. REUTERS/Umit Bektas

A Pillar coral (Dendrogyra cylindricus) showing a small amount of tissue loss caused by Stony Coral Tissue Loss Disease (SCTLD) stands near the University of the Virgin Islands campus in St Thomas in the U.S. Virgin Islands, May 17, 2019. REUTERS/Lucas Jackson

A frog is pictured on a lotus leaf after rain at a pond in Lalitpur, Nepal September 26, 2019. REUTERS/Navesh Chitrakar

A frog is pictured on a lotus leaf in a pond after rain in Lalitpur, Nepal September 26, 2019. REUTERS/Navesh Chitrakar TPX IMAGES OF THE DAY

Two green sea turtles touch heads at the Israeli Sea Turtle Rescue Center, in Mikhmoret north of Tel Aviv, Israel September 23, 2019. Picture taken September 23, 2019. REUTERS/Amir Cohen

A green sea turtle is seen as water splashes next to it inside a pool at the Israeli Sea Turtle Rescue Center, in Mikhmoret north of Tel Aviv, Israel September 23, 2019. Picture taken September 23, 2019. REUTERS/Amir Cohen

A newly hatched baby sea turtle makes its way into the Mediterranean Sea for the first time, as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen

A child holds a newly-hatched baby sea turtle born at a protective nesting site set-up as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen TPX IMAGES OF THE DAY

Newly-hatched baby sea turtles make their way into the Mediterranean Sea for the first time, as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen

A sea turtle hatchling emerges from the sand as it comes out of its nest inside a fenced-off protective nesting site, set-up as part the Israeli Sea Turtle Rescue Center's conservation programme, at a Mediterranean beach near Mikhmoret, north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen

A newly-hatched baby sea turtle makes its way into the Mediterranean Sea for the first time, as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen

A newly-hatched baby sea turtle makes its way into the Mediterranean Sea for the first time, as part of the Israeli Sea Turtle Rescue Center's conservation programme, at a beach near Mikhmoret north of Tel Aviv, Israel September 9, 2019. Picture taken September 9, 2019. REUTERS/Amir Cohen

A fish hook used by fish buyers is pictured at the Ofunato fish market in Ofunato, Japan September 24, 2019. REUTERS/Edgar Su

Sanma (Pacific Saury) fish are pictured at the Ofunato fish market in Ofunato, Japan September 24, 2019. REUTERS/Edgar Su

Fish buyers wearing rubber boots write their bids as they take part in a fish auction at the Ofunato fish market in Ofunato, Japan September 24, 2019. REUTERS/Edgar Su

Fish are sorted into a box by fishermen at the Ofunato fish market in Ofunato, Japan September 24, 2019. REUTERS/Edgar Su

Fatima, a two-year-old hippopotamus rescued from a circus, swims at the zoo in Managua, Nicaragua September 12, 2019. REUTERS/Oswaldo Rivas

Fatima, a two-year-old hippopotamus rescued from a circus, opens its mouth at the zoo in Managua, Nicaragua September 12, 2019. REUTERS/Oswaldo Rivas

Fatima, a two-year-old hippopotamus rescued from a circus, swims at the zoo in Managua, Nicaragua September 12, 2019. REUTERS/Oswaldo Rivas

Fatima, a two-year-old hippopotamus rescued from a circus, is fed at the zoo in Managua, Nicaragua September 12, 2019. REUTERS/Oswaldo Rivas

Fatima, a two-year-old hippopotamus rescued from a circus, shakes its head at the zoo in Managua, Nicaragua September 12, 2019. REUTERS/Oswaldo Rivas

Children look at a lantern display depicting marine animals during Mid-Autumn Festival celebrations at Jurong Lake Gardens in western Singapore, September 9, 2019. Picture taken September 9, 2019. REUTERS/Loriene Perera

A dead trout floats inside a farm cage at a fish hatchery in Tiquina village, Lake Titicaca, Bolivia, May 08, 2019. REUTERS/Manuel Seoane SEARCH "TITICACA CLIMATE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Olive Ridley turtle hatchlings are seen at a beach in Same, Ecuador, September 2, 2019. Picture taken September 2, 2019. REUTERS/Daniel Tapia

An Olive Ridley turtle hatchling crawls towards the ocean at a beach in Same, Ecuador, September 2, 2019. Picture taken September 2, 2019. REUTERS/Daniel Tapia

An Olive Ridley turtle hatchling crawls towards the ocean at a beach in Same, Ecuador, September 2, 2019. Picture taken September 2, 2019. REUTERS/Daniel Tapia

An Olive Ridley turtle hatchling crawls towards the ocean at a beach in Same, Ecuador, September 2, 2019. Picture taken September 2, 2019. REUTERS/Daniel Tapia

A sea turtle is seen in the Dalyan river near Iztuzu Beach near Dalyan in Mugla province, Turkey August 12, 2019. Picture taken August 12, 2019. REUTERS/Gleb Garanich

Aldabra giant tortoises eat carrots at the La Vanille Nature Park in Riviere des Anguilles, Mauritius, August 19, 2019. REUTERS/Benoit Tessier

An Aldabra giant tortoise looks at visitors at the La Vanille Nature Park in Riviere des Anguilles, Mauritius, August 19, 2019. REUTERS/Benoit Tessier

An Aldabra giant tortoise looks at visitors at the La Vanille Nature Park in Riviere des Anguilles, Mauritius, August 19, 2019. REUTERS/Benoit Tessier

Aldabra giant tortoises are pictured at the La Vanille Nature Park in Riviere des Anguilles, Mauritius, August 19, 2019. REUTERS/Benoit Tessier

Two Aldabra giant tortoises mate at the La Vanille Nature Park in Riviere des Anguilles, Mauritius, August 19, 2019. REUTERS/Benoit Tessier

Fishes for sale are seen inside plastic bags at Pabean fish market in Surabaya, Indonesia, August 4, 2019. REUTERS/Willy Kurniawan

A woman shops for fish at Pabean fish market in Surabaya, Indonesia, August 4, 2019. REUTERS/Willy Kurniawan

A woman shops for fish at Pabean fish market in Surabaya, Indonesia, August 4, 2019. REUTERS/Willy Kurniawan

A dead fish is seen in a dry pond in a village of Menhai county in Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, July 12, 2019. Picture taken July 12, 2019. REUTERS/Aly Song

A dead fish lies on the bank of Mekong River in Nakhon Phanom, Thailand July 24, 2019. Picture July 24, 2019. REUTERS/Soe Zeya Tun

Large crocodiles are seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

Large crocodiles are seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile is seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile eats a chicken given by Juan Cerdas, whose hobby is feeding them at the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A butterfly flies over a large crocodile in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile is seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A butterfly is seen above the eye of a large crocodile in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile is seen on the bank of the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile is seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A large crocodile is seen in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A Great White Egret is seen near a crocodile in the Tarcoles River, a river with one of the highest crocodile population in the world, in Tarcoles, province of Puntarenas, Costa Rica, July 16, 2019. REUTERS/Juan Carlos Ulate

A seals swims in the water, as a heatwave is expected to reach the city, at the Berlin Zoo, Germany June 25, 2019. REUTERS/Annegret Hilse TPX IMAGES OF THE DAY

A baby hippo stands in water near its mother Mona at Dvur Kralove Zoo, Czech Republic, June 12, 2019. Picture taken June 12, 2019. REUTERS/David W Cerny

A baby hippo stands in water at Dvur Kralove Zoo, Czech Republic, June 12, 2019. Picture taken June 12, 2019. REUTERS/David W Cerny

A baby hippo swims in a pond at Dvur Kralove Zoo, Czech Republic, June 12, 2019. Picture taken June 12, 2019. REUTERS/David W Cerny