Roy Moore Lobster Co - I loved this place.
It's basically a wooden shack run by a old salt kind of lobsterer that only serves lobsters, which are insanely tasty, and insanely cheap. I think atmosphere-wise you can almost not do better than this place, especially when you sit by the docks.
Is it a restaurant? Well, not really: It's more like a wooden shack with a pot of boiling water, but for what it's worth I found the lobster to be of equal quality to some I had in Tokyo last year which was literally more than ten times the price I paid here.
Roy Moore Lobster Co
39 Bearskin Nck, Rockport, MA