Hey y'all
I had seen an old horror movie awhile ago, and I remembered that it had a mermaid/siren in the opening credits.
The film is pretty gory and fairly poorly acted, so watch at your own risk, but the opening has a very etherial looking mermaid with a lovely white tail (then she turns less than polite). In any case, here's the clip on youtube that I found of the credits to DAGON.
(old H.P. Lovecraft short story about the ancient babylonian/syrian seagod of fertility)

http://www.youtube.com/watch?v=RepL0...eature=related