Creature From the Hillbilly Lagoon
Now here's a movie after my own heart - Creature from the Hillbilly Lagoon. A group of college students run afoul of a band of inbred rednecks, but making matters worse is the gillman monster spawned from toxic waste dumped into a nearby lagoon. Expect plenty of cheap, cheesy, gory, gooey, rubber-suited fishman on a rampage action. They don't make enough movies of this ilk for my take, and when they do they're usually of the Rana, The Legend of Shadow Lake variety.