An oceanarium can be either a marine mammal park, such as Marineland of Florida, or a large-scale aquarium, such as the Lisbon Oceanarium, presenting an ocean habitat with marine animals, especially large ocean dwellers such as sharks.
Marine mammal parks
Marineland of Florida, one of the first theme parks in Florida, USA, started in 1938, claims to be "the world's first oceanarium"
Marineland of Florida was developed as Marine Studios near St. Augustine in Marineland, Florida, which was followed in Florida by Miami Seaquarium, opened in 1955 and in California by Marineland of the Pacific, opened in 1954 near Los Angeles, and Marine World, Africa USA, opened in 1968 near San Francisco.
SeaWorld San Diego was opened in 1964, developed by four fraternity brothers Milt Shedd, Ken Norris, David DeMott and George Millay. SeaWorld Aurora opened in 1970 near Cleveland, Ohio. SeaWorld Orlando was opened in 1973. SeaWorld (San Diego, Aurora, Orlando) was sold to Harcourt Brace Jovanov