SeaWorld is a chain of marine theme parks in the United States with facilities in San Diego, California (opened in March 1964); Orlando, Florida (opened in 1973); San Antonio, Texas (opened in 1988); and previously also in Aurora, Ohio. The parks are a mix of dolphinarium (with sea lions, polar bears, manatees, penguins, dolphins, and whales) and amusement park.
Founded by four graduates of UCLA, SeaWorld was purchased by Harcourt Brace Jovanovich, Inc. in 1976, and by Anheuser-Busch in 1989. Since 2009, the theme parks are part of SeaWorld Parks & Entertainment, a subsidiary of the Blackstone Group. In 2019, SeaWorld Orlando was the 10th most visited amusement parks in North America, with 4.64 million visitors. SeaWorld San Diego followed in 14th place with about 3.74 million visitors.