I dont have any one fear, I have MANY:
#1 is the fear of deep, dark and open water, even if I'm on a boat !
#2 swimming with someone too close or touches me - i'll tear their eyes out !
#3 feet - i hate feet, i dont even like my own feet
#4 cockroaches - they move WAY to fast
#5 i have a fear that my cats will get out/escape and never come back or get hurt.
there are more, but those are the top 5