Some dozens of long-finned pilot whales lay dead on a remote beach in Iceland after they were discovered by tourists sightseeing in the Snaefellsnes Peninsula in western Iceland aboard a helicopter, Thursday July 18, 2019. The whales were concentrated in one spot on the beach, many partially covered by sand. (Photo by David Schwarzhans via AP Photo)

Onlookers gather around a struggling beached whale in the Yoff neighborhood of Dakar, Senegal Wednesday, May 21, 2008. Residents worked Wednesday morning to save some of the more than 80 whales that were stranded on the beach Tuesday night. This whale was successfully towed out to sea by a fishing boat, though at least 20 others lay dead on the beach by midday Wednesday. (Photo by Rebecca Blackwell/AP Photo)

A fisherman transports a dead whale shark after it was caught in fishermen's net, in Yangzhi county, Fujian province August 1, 2014. According to local media, the whale shark is five-metre-long and weighs over 2 tonnes. (Photo by Reuters/Stringer)

An official (R) measures the size of a whale shark (Rhincodon typus) carcass on the shore of Teluk Betung beach in West Sumatra, Indonesia, 08 October 2019. The dead whale shark washed ashore at Teluk Betung beach on 07 October 2019. (Photo by Rajo Batuah/EPA/EFE)

The tail of a stranded whale is pictured on the beach of De Haan, Belgium on October 25, 2018. (Photo by Francois Lenoi/Reuters)

A new book published by the UK Natural History Museum showcases some of the most memorable underwater photographs taken over the last few decades in its annual wildlife photographer of the year competition. Here: Giant gathering by Tony Wu. “The first indication that something extraordinary was going on were the blows, huge numbers of them – the exhalations of huge numbers of whales. Entering the water, the photographer witnessed an extraordinary scene”. (Photo by Tony Wu/Unforgettable Underwater Photography/NHM)

A white whale wears a wreath at the Hakkeijima Sea Paradise aquarium-amusement park complex in Yokohama, Japan, on October 3, 2012. (Photo by Associated Press)

Juno, a Beluga whale, greets a young viewer at the Mystic aquarium in Connecticut, USA on December 5, 2015. (Photo by Tim Clayton/Corbis)