This story first appeared in the Midcoast Update, a newsletter published every Friday. Sign up here to receive stories about the midcoast delivered to your inbox each week, along with our other newsletters. A few years ago, a researcher growing scallops in Penobscot Bay who was looking to engage students in her work asked Islesboro Central School for help picking baby scallops — called spat — off her project’s net bags. On a cold, wet March day,…