Shark is in the water. But is it near swimmers? Soon, New England beachgoers will know. An aquarium and environmental organization are working together to collect better data about shark sightings and help keep people informed of when the animals are nearby. Representatives with the New England Aquarium in Boston and Chatham, Massachusetts-based Atlantic White Shark Conservancy said Wednesday their expansion of the conservancy’s “Sharktivity” smartphone app will help protect both the humans and the sharks. The conservancy has used the app since 2016 to collect information from the public about the presence of sharks off Massachusetts.