Near Islamorada on Marathon Key is Keys Fisheries. They supply nearly all the Stone Crab claws in Florida. If you go to their outside , upstairs bar, they have medium Stone Crab claws for cheap ($1 each when I was there, my brother, who lives in Miami tells me they are now $1.50 each, still a great deal). They also had food specials of tuna tartare and shrimp cocktail.
