Sergeant Andrew Garrett watches K-Dog, a bottlenose dolphin attached to Commander Task Unit 55.4.3, leap out of the water while training near the USS Gunston Hall March 18, 2003 in the Persian Gulf. (Photo by U.S. Navy/Getty Images)

A man walks on a slackline during the 7th edition of the European “Marmotte Highline Project” (MHP) festival in Lans-en-Vercors, near Grenoble, eastern France, on July 4, 2019. The event, during which the participants will be able to evolve on the various highlines located in the Regional Natural Park of Vercors, takes place until July 7, 2019. (Photo by Philippe Desmazes/AFP Photo)

A serviceman of the 148th Separate Artillery Zhytomyr Brigade of the Armed Forces of Ukraine sits near shells as he and a soldier await command to fire a M777 Howitzer towards Russian troops at a position in a front line, amid Russia's attack on Ukraine, in Donetsk region, Ukraine, on February 8, 2025. (Photo by Anatolii Stepanov/Reuters)

A pug dressed as Yoda from the movie Star Wars walks along the runway at the 9th Annual Pug Parade on February 25, 2006 in Bradenton, Florida. 117 pugs competed for 10 prizes in 6 categories. Proceeds from the event benefit the Sarasota County Humane Society. (Photo by Phillippe Diederich/Getty Images)

A decorated elephant march at the Navam Perahera, a Buddhist pageant of elephants, dancers and drummers, in Colombo February 3, 2015. Over 50 elephants participated in the street parade for Gangaramaya temple's annual Perahera festival, along with a nightly procession of traditional dancers, fire twirlers and traditional musicians. (Photo by Dinuka Liyanawatte/Reuters)

Fans of American singer Taylor Swift, also known as a Swifties, shelter from the rain as they arrive for Swift's concert in Sydney on February 23, 2024. (Photo by David Gray/AFP Photo)

American vedette, burlesque dancer, model, and businesswoman Dita Von Teese performs on the runway during the Alexis Mabille Haute Couture Fall/Winter 2024-2025 show as part of Paris Fashion Week on June 25, 2024 in Paris, France. (Photo by David Fisher/Rex Features/Shutterstock)

Behaviour: Mammals category. Giant Gathering by Tony Wu, USA. Dozens of sperm whales mingled noisily off Sri Lanka’s northeast coast, stacked as far down as Tony could see. This was a congregation of dozens of social units, like a gathering of the clans. Aggregations like this could be a critical part of the whales’ rich social lives but are rarely reported. Some two thirds of the population was wiped out before commercial whaling was banned in 1986. This kind of major gathering could be “a sign that populations are recovering”, says Tony. (Photo by Tony Wu/Wildlife Photographer of the Year 2017)