The ocean’s most delicious crustaceans grew shells to protect themselves against the constant threat of hungry fishermen and rising underwater real-estate costs. Indulge in a hard-won meal with today’s Groupon to Caffe Regatta Oyster Bar & Grill in Pelham. Choose between the following options:

• For $29, you get a seafood dinner for two (a $72 value) that includes the following:
• Two dozen oysters (a $48 value)

• Two glasses of champagne (a $24 value)<p>

• For $39, you get a seafood dinner for two (a $108 value) that includes the following:
• Two pounds of Alaskan king crab legs (an $84 value)
• Two glasses of champagne (a $24 value)<p>

Owner and chef Anthony Labriola casts a Mediterranean spell over his seaworthy dinner menu, which showcases fresh raw-bar offerings that include Alaskan king crab legs and oysters. Shucked oysters hailing from Connecticut, Cape Cod, Blue Point, and Prince Edward Island rise up from the sea to quell seismic tummy grumbles and steal their pearls back from unsuspecting guests. Alternatively, sizeable spiny legs sprawl out across dinner plates as guests crack shells to expose sweet crabmeat. Champagne bubbles flow from flutes to tickle the backs of throats and clear pipelines for crustaceous morsels. Caffe Regatta Oyster Bar & Grill boasts an elegant white-tablecloth-style atmosphere flecked with whimsical, nautical flourishes, such as a model sailboat that perches atop the glistening bar to flaunt its inability to displace lacquer.