I'm looking for books that involve mermaids....and that are romance and/or erotica. I think I'm only looking for books involving mermaids and not selkie.

Please do not list the following books ( I already have read them):

I just saw a new YA one listed at ATUF.   Tempest Rising by Tracy Deebs. 

In Great Waters by Kit Whitfield

(I do have to add that I have not read either of these books.)

One that I have to add because it is so great at describing the ocean.  Tsunami Blue by Gayle Ann Williams. 

And the series by Cat Adams, starting with Blood Song.  (Not a romance.)

Thanks Emily! I will look into those :)

Anyone other suggestions???

I recently read a book calle The Last Mermaid by Shana Abe that fits your criteria.  I enjoyed it.

If you like Dragons she also has a series of books that start with one called The Smoke Thief which is quite good also...

Louise

How about "Forgive My fins" by Tera Lynn Childs

Here's a blurb about it. -

Lily, 17, is a mermaid princess living on land and attending a high school where no one knows her real identity. She needs to find a mate before she turns 18 in order to inherit the throne. Her big crush on Brody is going nowhere until her obnoxious neighbor, Quince, intervenes. A surprise kiss from the wrong boy leads to a tidal wave of unexpected consequences. In this lighthearted and mostly enjoyable novel, Childs stretches the relationship drama out perhaps a little too long for impatient readers, but the end result is sweet and satisfying. The ending hints of more mermaid tales to come.

I haven't read it but have seen it on lots of book blogs and it got really good reviews!