Ok so, no, but they did make a Splash, Too. So if you recall, at the end of Splash, Tom Hanks and Darryl Hannah are swimming to an underwater kingdom, and Hanx was told he can never return to New York once they go there. So while you'd expect this would start with them in said underwater kingdom, it opens with them on a desert island. Apparently they've been living isolated and alone on this island together, not underwater in a merkingdom. AND now Madison, played by Amy Yasbeck has magic powers to turn any water surface into a crystal ball-type pool where you can see what's happening anywhere in the world. Andy, played by Todd Waring is homesick and even though he was told he can NEVER return to New York, apparently they can. So they go back.
This whole movie is a terrible set up to what one presumes would have been an I Dream of Jeanie type TV show, because that's what it feels like. It's got horrible jokes, a wacky neighbor and the terrible premise of Andy needing to help his brother save his business and Madison finding purpose by trying to save a dolphin that's being experimented on. And this being the pre-big budget TV days you can't expect much in the way of effects.
I've already said more about this than it deserves, unfortunately. I mean, it's kind of "cute" in a way, but ultimately it's just plain dumb. It's boooooring. It's barely watchable, but if in a pinch (however that would happen) you could make it out of this sane.