Shark!!!

I was wade fishing the northern shoreline today when I noticed a fin sticking out of the water in about 3 ft of water.
Turned out to be a big ole' shark maybe about 5 ft. It came in too close for comfort so I high tailed it outta there.
Tried to see if it would take a top water but it wasnt interested in eating I guess it was just cruising around.
Are sharks something to be wary of while wadefishing that shallow it even got up about 10 meteres from the shoreline..