During the 2014 Tournament of Roses Parade, SeaWorld's float was accompanied by police in Pasadena, Calif. PETA supporters were arrested for protesting the float that day, and PETA claims that a SeaWorld employee posing as a PETA volunteer tipped police off to the protest. Ringo H.W. Chiu/AP hide caption

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SeaWorld is fighting back against critics of the theme park's treatment of animals following a sharp decline in attendance. PR Newswire/AP hide caption

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Elephant acts at Ringling Bros. and Barnum & Bailey Circus will be phased out by 2018, the circus' parent company said today. The elephants will retire to a conservation center in Polk City, Fla. Tamika Moore/AL.com/Landov hide caption

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Visitors watch an orca performance at SeaWorld in San Diego this year. The company has seen attendance slip in the year since the release of a documentary film critical of the company's captive whale program. Mike Blake/Reuters/Landov hide caption

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Killer whales perform in Shamu Stadium at the SeaWorld Orlando theme park in Florida. SeaWorld says it will not appeal a citation that prohibits trainers from performing with the whales. Phelan M. Ebenhack/AP hide caption

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In a photo released by SeaWorld San Diego, Kasatka, a killer whale who is approximately 37 years old, swims with her newborn calf in February 2013. Mike Aguilera/SeaWorld San Diego/Getty Images hide caption

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An image provided by SeaWorld San Diego shows Kasatka in December 2004 with a calf she had given birth to just days before. Mike Aguilera/SeaWorld San Diego/Getty Images hide caption

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