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Elephants line up during an opening ceremony for the King's Cup Elephant Polo tournament in Hua Hin, Thailand, Aug. 28, 2013.
This is the 12th year for the event. The sport started in Nepal in 1982.
Proceeds from the tournament go toward rehabilitating elephants rescued from abuse.
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Kevin, a transgender Filipino polo rider, gets strapped on to her elephant, Aug. 28, 2013.
There are 16 teams in this year's tournament, including one team of transgender players.
Each team has three players and three elephants. Matches take place on a field, 80 meters by 48 meters, using standard polo balls.
The game is divided into two seven minute "chukkas" or halves.
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Thai dancers perform during the opening ceremony for the King's Cup Elephant Polo tournament in Hua Hin, Aug. 28, 2013.
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Workers paint the lines on the polo field in Hua Hin, Aug. 28, 2013.
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Elephants enjoy a fruit buffet during the first day of events at the King's Cup Elephant Polo tournament, Aug. 29, 2013.
Paula Bronstein/Getty Images
Elephants line up during the opening ceremony for the King's Cup Elephant Polo tournament, Aug. 28, 2013.
Paula Bronstein/Getty Images
The foot of a mahout is seen as an elephant parades during the opening ceremony for the King's Cup Elephant Polo tournament, Aug. 28, 2013.
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Elephants enjoy a fruit buffet during the first day of events at the King's Cup Elephant Polo tournament in Hua Hin, Aug. 29, 2013.
Paula Bronstein/Getty Images
A Thai marching band parades on the polo field, Aug. 28, 2013.
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Elephants and polo players take part in game action during the first game at the King's Cup Elephant Polo tournament, Aug. 29, 2013.
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Elephants enjoy a fruit buffet during the first day of events at the King's Cup Elephant Polo tournament, Aug. 29, 2013.
Paula Bronstein/Getty Images
Elephants enjoy a fruit buffet during the first day of events at the King's Cup Elephant Polo tournament, Aug. 29, 2013.
Paula Bronstein/Getty Images
Thai dancers perform during the opening ceremony for the King's Cup Elephant Polo tournament, Aug. 28, 2013.
Paula Bronstein/Getty Images
Elephants enjoy a fruit buffet during the first day of events at the King's Cup Elephant Polo tournament, Aug. 29, 2013.