The Walking Beast on the move

If you're a movie fan, please help me answer this question!?

This is for my anatomy and physiology class 2 … is obtained by five percentage points in our bill if we can find this movie after my teacher gave us clues. The indices: 1. The film is a mystery murder of 1980. 2. The plot has something to do with the curse of Ondine respiratory problem – when a person has to breathe consciously. I doubt that this term or definition of medicine appears in the film. Perhaps the sleep apnea? 3. It is a scene from the film in which a woman in a pool. He said his suggestive … Perhaps his openly sexual? April. He also said there are "spiders" in the film. 5. There is a final twist, I've been searching online forever in search of clues at all, but I have to dry on ideas. The ideas I have so far is that the film is about a man who commits murder with scorpion venom that causes paralysis of the lungs the person. I try Yahoo, imdb, rotten tomatoes, either research indices, or real name of this movie?

http://us.imdb.com/title/tt0090738/ Black Widow (1987) Debra Winger, Theresa Russell Dennis Hopper

Octalus (Deep Rising) (1998) – Trailer (german)