I have read the first two Emily Windsnap books. The third just came out last month and I haven’t seen it at the library yet.
Aquamarine was so-so. I haven’t seen the film.
I found Teenage Mermaid too flighty.
I have yet to read Thora: A Half-Mermaid Tale.
I prefer Disney’s The Little Mermaid to the horrible suicide in the original fairy tale.
I like Sirena, but that’s more for your Greek list than the mermaid list.