For those fishermen who prefer venturing offshore, the Gulf of Maine is well known to be the premier area for ground fish. Most notable of the species are: Cod, Haddock, and Pollack. When fishing Jefferies Ledge one never knows what will come over the side of the boat, but it is usually fun to catch and almost always will make a great meal. July and August is prime time but deep water all summer and fall will satisfy the diehard bottom fisherman.