Re-watched

It's still on Netflix and I was in the mood for a shark film. The first time I watched it the ending left me a little confused. Upon watching it again it was a little clearer. I don't think though after watching it a third time that Lisa lived. In fact I don't think she really was rescued rather she drowned while still in the cage. The coast guard was just another hallucination caused by the nitrogen bubbles in her bloodstream or lack of air. I read somewhere that the film was loosely based on or inspired by actual events.