Galeophobia.

Galeophobia: An abnormally large and persistent fear of sharks. Sufferers from this phobia experience anxiety even though they may be safe on a boat or in an aquarium or on a beach. Hollywood films depicting sharks as calculating, vengeful diabolical monsters have no doubt enkindled the fear of sharks in many persons. So have validated reports of sharks venturing into rivers and lakes.
"Galeophobia" is derived from the Greek words "galeos" (shark with markings resembling those on a weasel) and "phobos" (fear). "Galeophobia" is also sometimes used as alternate term for ailurophobia, fear of cats, because the Greek word "galeos" is derived from "galee," a Greek meaning "polecat" and "weasel."

Welcome to my fear. It may seem irrational, what with my living in Ohio and all, but this is what I am learning to live with. Just thought I'd share with y'all as I prepare to vacation at the beach. I'm not too worried though. I'm just going to drink. A lot.