SeaWorld Orlando, Discovery Cove, and Aquatica Orlando have re-opened despite a consistent increase in Covid-19 cases within the state of Florida. It appears to be by reservation only. Despite how badly it's going in Florida, ZooTampa at Lowry Park, Gatorland, Zoo Miami, Brevard Zoo, Clearwater Marine Aquarium, Key West Aquarium, Busch Gardens Tampa, Naples Zoo, Palm Beach Zoo, Jacksonville Zoo, and Florida Aquarium remain open as well.
EPCOT, Animal Kingdom, Big Cat Rescue, and Miami Seaquarium remain closed. They're really the last hold-outs. I have a feeling a lot of closures will begin again soon based on the situation that occurred when the theme parks started re-opening.