In the summer of 1973, Joe Hage was in the seventh grade. Together with his peers, he boarded the old Boston Whaler from Project Oceanology just as dawn began to shimmer from behind the trees of Bluff Point. He remembers how instructors led the crowd into knee-deep waters, the velvety green marsh, eel grass tickling their mud-stuck legs, the crabs and snails and fish that flailed around in a beach seine.