The Monster of Camp Sunshine or How I Learned to Stop Worrying and Love Nature (1964)

Name: The Monster of Camp Sunshine or How I Learned to Stop Worrying and Love Nature
Genre: Comedy, Horror
Released: 1964-10-15
Duration: 75 min
Cast: Deborah Spray, Sally Parfait, James Gatsby, Ron Cheney, Angela Evans

A scientist carelessly dumps some toxic waste into a river. The gardener at a nudist camp drinks the water, turns into a monster and attacks all the (female) nudists.