Charley, Neri's humpback whale friend, is a 700 kg fiberglass and aluminum prop. The prop was used in scenes where Neri had to be close to the whale.
Marzena Godecki underwent extensive swimming and diving lessons for her part as Neri.
On March 2018, for the 20th anniversary of the end of the original broadcast on Network Ten, the worldwide distributor of the series, Beyond Distribution, have created an Ocean Girl channel on YouTube, allowing to freely consult the episodes. The channel have been renamed "So Fetch" lately.
The Press kit for Series 1 of the show states that Neri's name is a short form of "Nerida" which is Greek and means "A Sea Nymph."
Marzena Godecki was selected to play the part of Neri from over 500 girls.