The park was founded by Fred D. Coppock and Captain W.B. Gray and was the second marine-life attraction in Florida. When it opened in 1955, it was the largest marine-life attraction in the world. Hugo was captured in February 1968 in Vaughn Bay. Shortly after his capture, Hugo was flown to the Miami Seaquarium where he was held in a small pool for two years. Over the course of 10 years, judging by his behavior, it was clear that Hugo did not adjust to his life in captivity. Hugo would regularly bang his head against the walls of the tank. On March 4, 1980, Hugo died of a brain aneurysm after a history of repeated self injury. From 1963 through 1967, eighty-eight episodes of the 1960s TV show
Flipper and two movies starring Flipper were filmed at the Miami Seaquarium. From 1963 to 1991, the Seaquarium also had the
Miami Seaquarium Spacerail, which was the first hanging monorail in the United States. In 2014 Miami Seaquarium was bought by
Palace Entertainment. In 2022, the Miami Seaquarium was acquired by The Dolphin Company, which said that any negligence in animal care preceded their arrival. A 2023
U.S. Department of Agriculture (USDA) Inspection Report found several violations of the Animal Welfare Act. The report cited inadequate veterinary care, animal handling, facilities, employees and/or attendants, and critical separation of animals. In December 2023, three manatees were relocated to ZooTampa and SeaWorld Orlando. In January 2024, the USDA was satisfied that the operators had addressed issues related to their notice of intent to confiscate to remove certain animals. The lease requirements mandate certifications from both Alliance of Marine Mammal Parks and Aquariums and
American Humane. Local media reported in February 2024 that they had lost their accreditation from American Humane. The Dolphin Company was also behind on its rent payment according to the county’s parks department. In March 2024, Miami-Dade County sent a lease termination notice to The Dolphin Company, giving the Seaquarium's owner until April 21 to vacate the premises. In the notice, Mayor Daniella Levine Cava cited a "long and troubling history of violations." , the Dolphin Company, operator of the Seaquarium, was fighting the eviction. On March 31, 2025, The Dolphin Company filed for
Chapter 11 bankruptcy protection to deal with its debt and financial challenges. On September 16, 2025, Bimimi, a 26-year old dolphin, died from what The Dolphin Company stated was chronic illness. Her mother, Nosey, had performed as the
Miami Dolphins's mascot, Snowflake, in the 1994
Jim Carrey film
Ace Ventura: Pet Detective. On September 26, 2025, Miami Dade County and the Dolphin Company announced an agreement that would lease the Miami Seaquarium site to the South Florida development firm, Terra Group. Terra Group outlined its intentions to close the facility permanently in favor of an marina and a new aquarium without marine mammals and with modern zoological accreditation. The facility closed its doors over the weekend of October 11, 2025. ==Lolita the Orca==