DAVID LE/Staff photo. Nicole Corrivau, 11, of Salem, holds a rock crab as its measured by Andrea Gleason, right, who will be graduating from Salem State University. A large group of students from Salem, accompanied by teachers in a program at Salem State, and members of Salem Sound Coastwatch, joined forces early Thursday morning to go out into the Great Marsh near Conomo Point in Essex, and plant eel grass and document green and rock crabs. 8/6/15.