It's not the bread. It's not the toppings. It's not even the tartar sauce, though when it's homemade it can only help. The ineluctable element that makes a fish sandwich worthy of wonder is the fish itself: fresh, moist, and succulent, drawn straight from the water and filleted. When it comes to that core ingredient, there's no one we appreciate more than Capt. Jim Hanson, lifelong Miami resident and veteran commercial fisherman. At his seafood market-cum-quaint-neighborhood eatery, you can request the fish of the day, usually mahi-mahi or grouper, or be as specific as choosing the fillet -- that red snapper, right there -- you want out of the refrigerated cases. Then Captain Jim's staff will fry, grill, broil, or blacken it for you, pop it onto a roll with lettuce, tomato, and coleslaw, and even give you a choice of side dishes with it. We recommend the hush puppies, along with a cold Hurricane Reef Pale Ale.