for the i-team, rykath, wbz news. >>> numerous shark sightings have shutcod beaches. this is underwater video taken by scientists who were tracking the whale. as a precaution, three beaches are closed to swimming. >>> the countdown is on for the opening ceremonies of the pan- mass challenge. let's head out to david and lisa who are live in sturbridge tonight. guys-- >> reporter: and you can feel the excitement. it's like a party, a reunion, a sporting event. and as you mentioned. we'll be broading the opening ceremonies. >> we have people coming from and they are all trying to do the same thing. this year's goal, $46 million and i think we'll get there. the thousands of athletes range in age from 15 to 83 years old. many of them trained for months before takingthe event. and the average amount raised by each rider is an $7000. and everyone here has been inspired by something. >> it's a celebration, a tribute, or fomany of thop-- >> there are so many heartwarming stories, inspiring stories of why people are taking part in the pan-mass challenge. a sea of bikes, thousan