u/Material_Gate6370

The most underrated ones for me is Scooter: Secret Agent, Reef Doctors, Cybergirl, Horace and Tina, the original Pirate Islands, Lightning Point most of which have 1 season, Thunderstone (the only one in here with 3 Seasons) and even though I'm not the biggest fan of The Lost Treasure of Fiji, I still think it's watchable enough on it's own and yeah I guess The New Adventures of Ocean Girl (which imo can never top the original Ocean Girl), the only animated series that Jonathan was at least involved, unlike H2O: Mermaid Adventures.

https://archive.org/details/@daniel_prior147

As for the mid tier recommendations, those being Wicked Science, The Bureau of Magical Things (shame that Netflix removed it), The Elephant Princess (geo-blocked like crazy on YT & the Internet Archive vids sadly not support & thus they don't play unless you download them).

https://archive.org/details/@kyle900

As for Ocean Girl, my personal fav one I highly recommend, but don't sleep on the others of course as they deserved some more attention so via the links above & below and I would like to see someone or anyone do a ranking on the non-JMSP mermaid TV shows at some point.

https://archive.org/details/@letail

https://www.youtube.com/watch?v=icMdmGQQM_s

https://www.youtube.com/watch?v=HWiIuH9_Zz4

https://archive.org/details/the-bureau-of-magical-things-2018-21

Yes I did finally watch all 13 EPs of Reef Doctors in it's entirely on Internet Archive found and yeah I didn't expect all of these actors mainly the one offs that appeared in Jonathan M. Shiff's only tv show that has a M Rating most of which are from H2O & Mako Mermaids and also filmed in Queensland, Port Douglas the same place that Ocean Girl was filmed at back in the 90s.

The one off actors appeared in EP 2, 3, 5, 9 & 12 respectively.

Richard Brancatisano, Tasneem Roc who both play main characters while the rest only appeared in one EP.

https://archive.org/details/1\_20260427\_20260427\_0352

Thanks to Oceanic Oddities aka Daniel on his Internet Archive link down below

https://archive.org/details/1_20260427_20260427_0352/1.mkv

Currently in the middle of EP 8 and it was interesting to say the least in a good positive way & not to mention the cast and random one offs that later became main characters in Mako Mermaids, before & after with a few others like:

Remi Broadway in EP 3 who was in Cybergirl as another one off character

Tony Nikolakopoulos (Scooter: Secret Agent), Christopher Sommers (Mako Mermaids as a teacher in S2 EP 18, The Bureau of Magical Things), Kerith Atkinson & Lucy Fry (Rita & Lyla) appear in EP 5

Paul Bishop in EP 9 who appeared in H2O, Mako Mermaids & The Bureau of Magical Things at least once or as a recurring character and Lisa Mccune another well known Australian actress along with Bishop were in Blue Heelers and many more Australian TV, Rohan Nichol from Home and Away, MaveriX etc.

Isabel Durant aka Ondina appears in EP 12 before the finale. Tasneem Roc aka Nerissa in Mako Mermaids S3 as Olivia who is one of the main characters in Reef Doctors and also Apinya in The Bureau of Magical Things

Richard Brancatisano is also in the show and he was in The Elephant Princess Season 2 as Caleb and one of the Power Rangers in Mystic Force. Annabelle Stephenson aka Miriam from H2O appears in EP 2.

Damien Garvey aka Coach Norris in Mako Mermaids S2 EP 15 & Steve in H2O S3 EP 12 appears in Reef Doctors as Ranger Laurie Saunders in 4 EPs. (3, 5, 10 & 13).

Yeah most of these is of course from H2O: Just Add Water & Mako Mermaids.