Animal handling 101 do not stick your hand near a domestic animal's mouth..........to say nothing about a shark's. I thought a shark attack was when a shark attacked a swimmer or surfer, not when you stick your hand in ones mouth and get bit. Next thing you know people will be sticking there hands in barracuda and moray eels mouths.
I agree with Sam Scuba, observe them and let them live their normal lives. To me, feeding wild animals only makes them welfare animals.