Detail of the paving showing a cod; a fish traditionally connected with Boston. The fish measured approximately 18 inches long.	An image of Sargassum (Sargassum filipendula), or brown algae from the shoreline. The line was sandblasted on location intoranite pavers and cobblestones, and then filled in with black paint.	A wider view of the Shoreline marking shows sea collander (Agarum cribrosum) and sea and shore grasses. Other images in the shoreline include a sea robin, rockweed, knotted wratch, a small grab, a boat, and a clue to one of the puzzles in the MIT IAP Mystery Hunt.