Hello!
This is a long shot, but here it goes.
In the early nineties I got a mermaid doll, in fact I had several, this one was pretty unusual though.
This was when mermaid dolls were pretty popular and knock-off little mermaids were everywhere.
Was in a toy store in Italy, had some money (think it was birthday cash) this doll caught my eye just as I was leaving, I know it must have been pretty cheap because I had already spent most of my money and had just enough left over for her.
Sadly I don't have any photos of the doll, I'm not sure what happened to her after moving several times growing up.
I will do my best to describe the doll from memory and link pics of similar dolls.
This doll was about the standard Barbie size, was not an official barbie, sindy , disney, steffi love or other popular brand.
I do not remember the brand alas.
I don't believe it was a 'mermaid princess' I had several of those too though.
She had a solid body, heavier higher quality plastic than most 'knockoff' dolls, pretty well made.
If I remember correctly her knees bent slightly (that kind of clicky bend not fully jointed) and her arms were slightly rubbery not totally rigid. Could be wrong!
A gold sequinned top and tail, the top was very similar to this doll, but I think the tail was different
This doll is certainly the most similar, but not identical. May be made by the same company? Can't find one exactly like it though.
https://www.flickr.com/photos/battycollector/5485376320/The tail was closer (but not identical to) this doll, but gold more like the fabric from the top I think
https://www.aliexpress.com/item-img/29cm-Fantasy-Mermaid-Doll-Fashion-Jointed-Ocean-Princess-Doll-Dolphin-Sea-horses-Suit-Original-Design-Children/32659579987.html?spm=2114.10010108.1000017.4.vLzcOwShe had long yellowish blonde hair, I think there were other colours too.
The most noteworthy and unusual thing about this doll though, and I hope this is okay to bring up here, was that, well- she had a 'realistic' chest, it was rather um 'detailed' in a very unusual way. I haven't seen another doll that was moulded like that.
I thought this was hilarious as a kid, also it was kind of annoying because most barbie etc outfits didn't fit or looked odd on her, let's just say she looked cold in several tops haha.
She was a somewhat different body type to most barbies in general so many doll clothes didn't fit.
My husband doesn't believe me when I tell him I had a doll with that detail, aside from her chest the rest of her was a pretty normal mermaid doll.
I got her in Italy, but I think there was writing on the package in several languages.
Has anyone else encountered a doll like that?

I'm very curious to learn what kind of doll this was and if anyone else remembers them.
Thanks!