A SeaWorld employee posed for years as an animal rights activist, joining protests against the company over its use of captive killer whales, according to People for the Ethical Treatment of Animals (Peta).
Peta, based in Norfolk, Virginia, said a California activist who identified himself as Thomas Jones had been taking part in the group's activities.
He protested against a SeaWorld float at New York's Thanksgiving Day parade in 2013, held anti-SeaWorld signs outside the company's San Diego theme park, and got hauled away by police at the 2014 Rose Parade in Pasadena, California.
Peta officials said "Jones" was another man: 28-year-old Paul McComb, who has worked in several positions at SeaWorld since at least 2008, including as a human resources representative, according to a job history posted on the website Jresume.com.
The claim, if true, could mark another public relations black eye for SeaWorld, which has faced withering criticism of its marquee attraction - trained killer whales performing for guests. The company has endured a critical documentary, boycotts and the loss of sponsorships. Attendance and revenue have suffered.