Amy Yasbeck went through extensive physical training in preparing to play Madison for the underwater swimming shoots when in her mermaid tail costume.
Amy Yasbeck was originally offered to wear the mermaid tail costume worn and used by Daryl Hannah from the first Splash (1984), but as she could not fit into it, and after undergoing a body cast, a new form-fitted mermaid tail was made for her. It took three people to zip up the tail on Yasbeck, and then lift her into the water.
The first movie ever to be filmed at the then-new Disney-MGM Studio complex.
Dozens of actresses were looked at to play the role of Madison, but none were right for the role until the producers found Amy Yasbeck - who did a screen test for director Greg Antonacci - was cast at the start of 1988.