The problem with seafood is that it's usually not decadent enough. Sure, a piece of broiled grouper is good for you, but it's got no "it" factor. Enter Izzy's Fish & Oyster, the South Beach restaurant that takes its cues from New England clam shacks, where all manner of residents of the sea are either fried or cooked with heavy cream and butter. Take, for example, Izzy's warm lobster roll ($28): The meat of an entire lobster is drenched in lobster butter and placed on a pillowy toasted white-bread roll. Not enough sin for you? Go for the lobster poutine ($18) — a bright-yellow skillet filled with waffle fries, lobster, cheddar sauce, and bacon. For a taste of the sea, order a dozen fresh oysters ($38) or fried clam bellies (MP), boasting a juicy brine that pops in your mouth. Now that's a meal fit for King Neptune.