Deep Water Phobia

Well... this is probably going to be the most ridiculous reason to be afraid of water. I am NOT afraid of water mind you, i enjoy showers, rainwater, sea water, lake pond river waters. Challenge accepted. But i AM afraid of deep waters. Why? Thanks to the creator of jaws, lake placid and frakenfish. Deep Blue Sea was one of the movie i can remember the most and it's probably where my fear of deep waters started. Who knows what can be lurking beneath your feet, ready to grab your feet and drag you under?
Although i'm afraid, I still enjoy swimming in pools and waterfalls WITH the exception that I'm not alone. What's with the reason? Cuz i wont be the first one "whatever it is underneath" will grab (hopefully).
I do love strolling or waddling in shallow waters or waist high waters. Anything but swim in deeper water.
But one thing weird about me, i still watch these jaws movies tho it'll only make my phobia worse but i do just like watching it. It's weird i know but well... that's me. If you got nothing to do and fancy a bit of scare then maybe you can try watching these kinda movie?