My DH swam around the family beach with a 5 foot Nurse Shark. I personally would have freaked! We love to snorkel and have done so at many different places. I have never encountered a shark. Also, my husband shook hands with a 4 foot baracuda in Cozumel. We have great pics of him baring is sharp and scary looking teeth. My DD was with him at the time and immediately removed herself from the reef upon encountering him. She came out of the water crying and saying that the snorkeling there was WAY too intense for her and she thought the baracuda ate her dad because she couldn't find him. She was 14 at the time. We laugh about that now when we view the great pics! Don't go into the water if you are on your periodical, don't wear shiny jewelry or swimwear (they resemble scales), avoid early morning and dusk hours, and always have a buddy with you. The ocean world is a wondrous thing but it needs to be respected. Hope you enjoy yourself!