Soxy and Laura are sadly mistaken. there are sharks in every ocean of the world. The ocean is their home, we are just visitors. Even in shark infested waters, shark attacks are very rare. In fact, it is much more dangerous to drive to the beach that it is to go surfing. You are m,ore likely to win the lottery on the same day you get struck by lightning than it is to ever even be nipped by a shark
Yes, there are other ocean hazards, jelly fish are the main one that I can think of. But again, millions of people play int he oceans of the world every year, and only and handful fall prey to any kind of attack by sea creatures. Most ocean deaths are the result of inexperienced swimmers not realizing their limitations in the face of rip tides, undertows and sometimes very big waves.
I have been surfing since 1966, and they haven't gotten me yet.