Orca

This film was made during a time when Orca whales were not too well studied and known about. That being said, it puts a whole different sense of fear into the one watching the film. I'll call this the "boat scene" when a key point in the movie occurs, which is one of the most disturbing scenes in any film I have ever seen. It leaves you with a feeling of sorrow and pity for the antagonist (or protagonist?) and can only imagine the pain he must be feeling. The movie is so complex in its situations that it leaves the viewer with mixed feelings on who the overall winner should be. It remains one of the best marine horror movies in my book. I definitely recommend it.