I lived on Clearwater Beach my entire life, until I went away to college. We spent many, many weekends on our boat in the Gulf. We still visit for an extended period every summer. I have NEVER seen a shark. Stingrays in August = too many to count. A ton of dolphins? All the time. Sea turtles? On occasion. Jelly fish? Every great once in a while, when they'd beach themselves. Any species of shark? Never.
Belleair Beach is just about three minutes away from Clearwater Beach.
Regardless, be smart. Sharks are attracted to blood, so don't enter the water -- beyond about 12 inches -- with a bleeding cut. I also don't swim in the ocean during "that time of the month."
Remember: Sharks don't eat people. Most shark bites occur because the shark has become disoriented and has mistaken you for its prey. In fact, many shark bites occur when people enter the sharks' feeding areas, such as tropical reefs or sea lion/seal habitats. In all actuality, you're more likely to be struck by lightening than be attacked by a shark, particularly in Belleair Beach.
Now would I swim willy-nilly in the Pacific Ocean, in deep waters off the coast of Australia or Hawaii? Not on your life!
Enjoy yourself... You have nothing to worry about!
Sheila