Quick Google search, yields results: Creature from the Black Lagoon. Universal 1954. Black and white. Mono. Shot on the lot at Universal, and at some state park in the Florida panhandle ( underwater stuff and footage for back-projection ).
Many other films and TV shows shot around here, though.***New thread, anyone?***
Hey! My Dad, who was born and raised in Marin, has ALWAYS told me they filmed part of one of the Creature Films in Marin.. I THINK he even said Tiburon..