The first thing that came to my mind was Ocean Girl. it's a sci-fi kids show from 90s made in Australia. They actually build more underwater constructs. but here is a start. Great things have small beginnings and sci-fi has always been an inspiration for the future.

The energy sources are sustainable and SeaOrbiter can be used to better understand our oceans. We surely have put more attention into the space than our very oceans. It's time to change that. Great Hunt! Deserves #1 spot