first time diving with sharks and the shark comes up to me and scratching them into the nose they go in tonic. >> i won't be doing that any time soon. >> the shark is so sweet >> we have brandy mcmillen who hosts a show on cbs where he trains dogs and swims with sharks also and talks about how similar they are. i don't think people think of sharks as the doctors of the sea and that three quarters of our oxygen comes from the ocean. and without sharks disease in the ocean would spread to epidemic and right to humans so they are vital for our survival as well as the ocean's survival. so think people -- obviously