Shooting star by Tony Wu, US/Japan. Winner, underwater. The electrifying reproductive dance of a giant sea star. As the surrounding water filled with sperm and eggs from spawning sea stars, Wu faced several challenges. Stuck in a small, enclosed bay with only a macro lens for photographing small subjects, he backed up to squeeze the undulating sea star into his field of view. The dancing posture of spawning sea stars rising and swaying may help release eggs and sperm, or may help sweep the eggs and sperm into the currents where they fertilise together in the water. Kinko Bay, Japan. (Photo by Tony Wu/Wildlife Photographer of the Year)

A marine rescue worker from Sea World works in a joint attempt with his colleagues to help a juvenile humpback whale stranded at Palm Beach on the Gold Coast, in Queensland July 9, 2014. (Photo by Jason O'Brien/Reuters)

Rescue workers try to help a driver out of his car, after the vehicle was stuck over an alley in Wenzhou, Zhejiang province, August 4, 2014. The car rolled off the edge of a road after the driver was late to brake, according to local media. (Photo by Reuters/Stringer)

A Rohingya refugee woman is helped from a boat as she arrives exhausted on the Bangladesh side of the Naf River at Shah Porir Dwip after fleeing her village in Myanmar, on October 1, 2017 in Cox's Bazar, Bangladesh. (Photo by Kevin Frayer/Getty Images)

A soldier helps another with her ear protection at the Terningmoen Camp in Elverum, Norway on March 23, 2017. Soldiers demonstrate their skills and tactics during a contract drill as they train to become part of the world's first all-female special forces unit, the Jegertroppen or “hunter troops”. (Photo by Carolina Reid/NBC News)

A health worker pretends to give a shot to a girl's doll to help put her at ease before giving her a shot of the Coronavac vaccine for COVID-19, at a sports center as children age 5 – 11 start getting vaccinated in Asuncion, Paraguay, Monday, January 31, 2022. (Photo by Jorge Saenz/AP Photo)

A military cadet gets help from a colleague to adjust her hair before taking part the military parade in Bucharest, Romania, Saturday, December 1, 2018, as thousands turned out Saturday to celebrate 100-years since Romania became a modern-day state, amid concerns about rule of law and the state of democracy. Crowds braved temperatures of minus 5 Celsius (23 Fahrenheit) to watch the military parade of troops, tanks and military vehicles. (Photo by Vadim Ghirda/AP Photo)

A three-year-old girl smokes a cigar during the Saint Simon celebrations in San Andres Itzapa, Guatemala, on October 28, 2019. Thousands believe that the saint helps people find work, solves family problems and cures illnesses. (Photo by Orlando Estrada/AFP Photo)