A look at SeaWorld, which celebrated its 50th anniversary on Friday, by the numbers:
1964: First SeaWorld opened in San Diego. Founders envisioned a park that combined Disneyland, the San Diego Zoo and the now-defunct Marineland, an oceanarium in Palos Verdes, Calif.
11: Number of parks under SeaWorld's parent company, including the three marine-themed parks in San Diego, Orlando, Fla., and San Antonio, Texas
$1.46 billion: Revenue in 2013
23.4 million: Attendance in 2013 (total for 11 parks)
$84: Price for a single-day adult ticket to SeaWorld
67,000: Number of animals currently in SeaWorld's care (7,000 marine and terrestrial animals, 60,000 fish)
23,000: Number of animals rescued from wild in past 50 years. About half are rehabilitated and returned to the wild. The rest usually die from an illness or injury. A small percentage end up living at SeaWorld.