1. Sharks and deep water in general. Including pools more than six feet deep. The idea of snorkeling in shallow coral reef waters is terrifying. Augh.

OMG ME TOO! I had to give up swimming laps because I would start to panic at the deep end of the pool. I was sure that the sharks were just out of my line of vision and coming for me. Trips to the aquarium can also be slightly problematic, although I still like aquariums.