Heh. I have only kayaked on the ocean once. It was a sit on top kayak and I am more used to sit inside kayaks. I wasn't afraid of sharks but was afraid that I would fall off the thing and then get hypothermia before I could swim to shore. This was N. California. I wouldnt have that fear in Florida.
On a side note, I was once in Myrtle Beach swimming with a friend. A great big school of fish came in near shore and so we went to go see them and swim among them. Bad idea. A shark attacked! Not us but the fish. I am so unafraid of sharks that I didn't want to stop swimming but my friend insisted. LOL. It was just a little one though, maybe two feet long. Still, she likes to tell that story at parties although in her version it has morphed into a great white and I refused to go to shore until she dragged me out. I wouldn't worry about sharks if I were in a boat, even a kayak.