Costello’s Clam Shack, a seafood restaurant in Groton, Connecticut, offers a casual dining experience with fresh seafood dishes and waterfront views. We prioritize quality ingredients and attentive service to deliver a memorable meal.
Operator computes a Health score continuously. It is the one number that tells you if this shop is winning, losing, or steady. Here is how Costello's Clam Shack broke down on Apr 25, 2026.
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