How many sharks live around the Island?

In general the sharks come to the area only for a few days then leave only to return a month or two later. So the shark is only a visitor to the island, possibly only to take a seal which forms a small percentage of it's natural diet. For most of it's life it will feed on fish, squid, turtles and other marine life. It is not possible to even estimate how many White sharks are on our coast since it is difficult to track them unless they are tagged.