Marineland of the Pacific was a public oceanarium and tourist attraction located on the Palos Verdes Peninsula coast in Los Angeles County, California. Architect William Pereira designed the main structure. It was also known as Hanna-Barbera's Marineland during the late 1970s and early 1980s. Marineland operated from 1954 until 1987, when it was purchased by the owners of SeaWorld San Diego. The new owners moved the popular killer whales and other animals to their San Diego facility and abruptly closed Marineland.

An oceanarium can be either a marine mammal park, such as Marineland of Canada, or a large-scale aquarium, such as the Lisbon Oceanarium, presenting an ocean habitat with marine animals, especially large ocean dwellers such as sharks.