What trigger a tiger to attack a person?

There are approximately 360 known species of sharks in the world, only 5 of those species can potentially attack a human.

Great white, oceanic white tip, tiger shark, great hammerhead and bull shark.

Now, sharks mainly eat mornings and evenings, the larger shark species that I just mentioned like to eat bigger prey like seal and turtles, when we are on the surface of the water we can look like a seal when we are swimming and a turtle when we are on a surfboard.

So if you are in the water at dusk and dawn when they normally eat, looking like their food... they're going to try to eat you, but they let you go again, you may or may not survive, but the fact is that SHARKS DON"T LIKE HUMANS! SO leave them alone, don't go in the water when it's their feeding time and start to understand that humans are not the most important species in the world, we are the most dangerous and destructive animal ever!