Question About Marine Life (or dangers)

Hey as you can probably tell by reading my board thread, you can guess that I am new to all of this. Until now my only interests were (outside of family and friends) basketball, soccer, football and poker.
Well that changed recently as I watched some surfing on TV and decided to give it my all and try it, and I don't go do anything half assed. Anyways, before going out there and trying this I want to admit that I am TERRIFIED of sharks. When I was about 15 I saw a documentary on Discovery that showed Daytona Beach from a helicopter view during July/August and you could literally see the shadows of HUGE fish, which one could guess to be sharks, swimming around beach comers and surfers.
Well what do you do to take your mind off of sharks? What do you do when you see one and are not able to distinguish it from a safe shark and a dangerous shark? Also in regards to jellyfish what does one do? I don't know when season comes around for jellyfish or anything like that so if there is a thread to cover these things please let me know!
Always Appreciated,
Fernando
Well that changed recently as I watched some surfing on TV and decided to give it my all and try it, and I don't go do anything half assed. Anyways, before going out there and trying this I want to admit that I am TERRIFIED of sharks. When I was about 15 I saw a documentary on Discovery that showed Daytona Beach from a helicopter view during July/August and you could literally see the shadows of HUGE fish, which one could guess to be sharks, swimming around beach comers and surfers.
Well what do you do to take your mind off of sharks? What do you do when you see one and are not able to distinguish it from a safe shark and a dangerous shark? Also in regards to jellyfish what does one do? I don't know when season comes around for jellyfish or anything like that so if there is a thread to cover these things please let me know!
Always Appreciated,
Fernando