Dark Vanessa, long a contributor to Erotic Mad Science, gives her version of a classic pulp cover of a mad scientist turning women into mermaids in tubes.
You can download a high-resolution version of the image by clicking on it.
Tube Girl Mermaid Transformation commissioned by Dr. Faustus of EroticMadScience.com and drawn by Dark Vanessa is published under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.)
Dark Vanessa here takes her inspiration from a cover of Terror Tales, May 1940.
I’ve only found this in fairly low resolution, sadly.