Believe it or not, Hannah Fraser is a professional mermaid. She is a model, ocean environmentalist, and performance artist. She has always been interested in the mermaid myth, enough so to make being one her career. She has done photo shoots, commercials, and just some random swimming around in the ocean.
Check out more of her work here www.hannahfraser.com
And this site is strictly the mermaid stuff http://www.hannahfraser.com/mermaid/
Here is an interview on a show called Super Human, talking about her livelihood