David Hall’s photographs of scenery and creatures off the coast of Canada in the Pacific Northwest portray serenity under the water, which belie the extreme challenges he faces to get his images. For each shoot, Hall wears a dry suit, a neoprene body suit that covers all of his body but his head and traps air inside to keep him warm. Water temperature in Canada’s British Columbia typically ranges between 45 and 50 degrees Fahrenheit. Photo: Moon jellyfish and cross jellies. (Photo by David Hall)

Split Apple Rock is a geological rock formation in The Tasman Bay off the northern coast of the South Island of New Zealand. Made of granite, it is in the shape of an apple which has been cut in half. It is a popular tourist attraction in the waters of the Tasman Sea approximately 50 metres off the coast between Kaiteriteri and Marahau. The rock sits in shallow water at low tide and is accessible by wading. It is also a point of interest for the many tourist boats and pleasure craft which operate along the shores of the Abel Tasman National Park. The cleft to produce two sides of the 'apple' was a natural occurrence. It is unknown when this happened and therefore the cleaving of the rock has attracted mythological explanations.

Revelers celebrate during fireworks marking the start of the New Year on Copacabana beach on January 1, 2017 in Rio de Janeiro, Brazil. Brazilian revelers traditionally dress in white to honor the New Year's holiday along with the Brazilian Goddess of the Sea- Iemanja. (Photo by Mario Tama/Getty Images)

Models wearing facekinis, popular with female bathers who want to protect more than just their modesty, pose for a picture on a beach on August 5, 2019 in the Chinese seaside city of Qingdao, Shandong Province of China. (Photo by Xu Chongde/VCG via Getty Images)

Kyrgyz men on horseback compete during their traditional game of “Oodarysh” during the celebrations of the 90th anniversary formation of the Chui region in the village of Kuntu some 20 kms from Bishkek on May 27, 2016. (Photo by Vyacheslav Oseledko/AFP Photo)

A woman lies injured after an incident on Westminster Bridge in London on Wednesday, March 22, 2017. A police officer has been stabbed near to the British Parliament and the alleged assailant shot by armed police. Scotland Yard report they have been called to an incident on Westminster Bridge where several people have been injured by a car. (Photo by Toby Melville/Reuters)

Street artist Juandres Vera puts the finishing touches to a giant 3d pavement mural of The Beatles on September 23, 2011 in Liverpool, England. The giant 24m long by 6m wide work, entitled “XXL Liverpool” has been commissioned to celebrate the dual 50th anniversary of The Beatles first gig at The Cavern Club and meeting their manager Brian Epstein. The Beatles drawing kicks off The James Carling International Pavement Art Competition which starts on Sunday and will feature more than 50 of the world's best pavement artists (Photo by Christopher Furlong/Getty Images)

The first load of passengers queuing for the Bennie Railplane in Glasgow; the inventor George Bennie is third in the queue. The streamlined cars are self propelled, driven by air screws in front and behind, and hang from a steel girder. (Photo by J. A. Hampton/Topical Press Agency/Getty Images). 4th July 1930