California's Channel Islands were popular spots for mermaid movies. At least five movies filmed offshore involved mermaids. One of these was Undine, released on February 7, 1916. It was filmed on Santa Cruz and Santa Catalina Islands.
The film featured lots of mermaids exposing lots of feminine form. One reviewer suggested that Undressed would have been a better title. "Never in any film production to date has there been so much female loveliness with so little draping. In fact, there were entire stretches of the picture when the female loveliness wasn't draped at all." - Variety, February 1916
No known copies survive.