Bought these 3 outfits from a local artist:

A few closeups on Mermaid (this doll is not mine):

Dresses have a tiny zipper on the back and a hook which prevents from unzipping:

The one on Lina is probably my favorite. It has an attached cape that fastens at the back with a button:

And finally the one on my alien Barbie:

It's a two-piece set:

All the outfits are also lined on the inside:

It adds to the realism 🙂