It seems like nearly everyone wants to be a mermaid at some point in their life. Well, at least I did. So for the fun of it, and because I can, I made a latex mermaid tail that is fully capable of swimming in.
Just a disclaimer, this is not a cheap endeavor to start. Look to spend about $500 in materials and plenty of time on this project. If you are looking for a mermaid tail that will last considerably longer, follow the same steps but with silicone.