I have seen H2O: Just Add Water, Third Rock from the Sun, Star Trek series (The Original Series, Deep Space Nine, Enterprise, The Next Generation, Prodigy, Lower Decks), Stargate SG-1, Stargate Atlantis, and Ocean Girl multiple times.

[B]H2O: Just Add Water[/B]: This show follows three teenage girls who gain the ability to turn into mermaids after coming into contact with a magical pool of water (the Moon Pool).

[B]Third Rock from the Sun[/B]: It’s about a group of aliens who come to Earth to observe human behavior.

[B]Stargate SG[/B]-1: This sci-fi series follows a team of explorers traveling through the Stargate to explore ancient alien civilizations and fight against galactic threats.

[B]Ocean Girl[/B]: This Australian sci-fi series focuses on a young girl named Neri, who lives alone on an island. The show follows her quest to protect the ocean and its secrets, while forming deep friendships with the crew of an underwater research facility called ORCA (Oceanic Research Centre of Australia).