Ive been surfing the Jersey shore for 12 years. The only sharks ive ever seen in person were a couple of lil nursing or sand sharks up on the beach. And they were under 2ft long.
They are out there but I wouldnt worry to much!
I remember last year(maybe two years ago) when Taj was on the world tour in i think south africa. During his heat a giant great white appeard behind him. Needless to say he left the water in a hurry and forfitted. They gave him crap for it but i dont care id rather live to surf another day!!!!