The zoo opened in 1954, when legislator
Benjamin Cole authored the law that created the zoo, which was named after its founder and first director Dr.
Juan A. Rivero. The zoo went through a major upgrade in 2003 with the addition of an aviary, arthropodary and a butterfly exhibition. The economic crisis related to the
government debt crisis in Puerto Rico that began in 2014, led to issues with zoo maintenance and animal care. at the zoo Despite the zoo being closed to the public after
Hurricane Maria in September 2017, the zoo still had employed zookeepers to care for the animals, including two lion cubs that were born at the zoo in 2019. That same year, volunteer efforts began to help maintain the zoo in preparation for a planned 2021 reopening of the facilities. The following year, in 2020,
FEMA had assigned $6.2 million to the zoo for repairs related to the hurricane.
Mundi the elephant One of the zoo's most popular and well-known animals was Mundi, a female
African savanna elephant, born in the wild in 1982 at
Hwange National Park in
Zimbabwe. She was rescued among 63 other young African elephant calves through a rescue mission funded by
Arthur Jones, after they were left orphaned by the Zimbabwe government, who organized a mass
culling. Jones brought the calves to the United States in 1984, including Mundi, and sold them off to circuses and zoos. Mundi was sold off to the Mayagüez Zoo in 1988 after a brutal attack left her blind in one eye and a permanently damaged tusk. She remained in solitary display for 35 years at the time when the zoo was permanently closed in February 2023. In 2017, plans to relocate Mundi began through
Carol Buckley's Elephant Aid International non-profit organization. In 2018, the organization signed a contract with the Government of Puerto Rico to relocate the elephant to Buckley's Elephant Refuge North America sanctuary in
Attapulgus, Georgia but the plans were thwarted when the
2019 political scandal erupted and the contract was cancelled. After the zoo ceased operations in February 2023, Mundi was transported and escorted to
Rafael Hernández Airport in
Aguadilla on May 11, 2023 and flown to
Jacksonville, Florida the next day. She was then transported by ground to Buckley's sanctuary, to live the rest of her lifetime with two rescued
Asian elephants Tarra, a female, and Bo, a male. ==Decline and closure==