Yes it's true they are here now, and every year but there does seem to be more than usual. The water here is very clear so unless you were in a school of fish a bite would be very rare. These are called spinners or black tip, and they are fun and beautiful to watch, we have sailed, or should say they have swam and jumped near our boat in the past. For some reason(feeding or mating?)they spend alot of time jumping and spinning, sometimes quite high out of the water.
That photo is why I take my rings off before going in the water. The baracuda here are just as frightening also most of the time harmless.

Jerry