kayak. and a paddle boarder in front of him. what do you do? do you paddle really fast and possibly draw attention to the shark or disappear and not paddle at all? they have had two great white sightings this year over in in the chatham, or liens area of cape cod. one on the west coast, a shark taking a bite out of the kayak. that shook up the locals there. >> i've been surfing for a lot of years and never seen a shark. >> doesn't desire me. i'm eyewear of it. we're in their turf. always that element. i would be lying to tell you every time i paddle did out you don't think at least once about it. martha: sure you do, right? here is a shark advisor for the discovery channel. also the director of fishes for the national aquarium. andy, welcome, good to have you here. >> good morning. martha: what is your reaction of the picture of the guy with the kayak and that shark right behind him? >> certainly is a stunning