it s become an annual rite of summer on the sandy shores of cape cod, the arrival of the great white shark. what s happening is you ve got this growing rebust seal population, white sharks feed on seal sos if the seems are growing and are there every year i think the white sharks will continue to come back. to a great white, seals are like fast-food, and in massachusetts, it s the drive-up window. there are thousands of them, most spending their days on dry land, mindful, perhaps, of what lurks beneath. i ve got about 27 years of studying sharks under my belt with the holy grail being the great white and finally i ve got a chance to study them in in any way back yard. and tag them with satellites so the mig bration can be tracked, but what s fascinating is a little disconcerting to beach goers. kind of freaked out. red flags ean for swimming and beachs are closed when dorsal fins are spotted. that was down the boat