'Cudda's are what I fear most. Sharks, okay, yes, I do have them in my mind, but my first time snorkeling I came face to "face" with a cuda and it was NOT, NOT, fun. Fortunately the people I was with told me hold my ground and not panic. I did not have anything "flashy" on, they were just courious. Jelly fish, COMPLETELY scare me. They hurt!!