Private equity firm Sentinel Capital Partners has acquired American fast casual seafood restaurant chain Captain D’s from Capital Partners for an undisclosed sum.

Capital Partners is an US-based private equity firm that purchased the majority stake of Sun Capital Partners in the quick service restaurant (QSR) seafood restaurant in October 2013.

Founded in 1969, Captain D’s currently owns, operates 303 restaurants and franchises 227 locations in 21 US states.

Based on ocean-caught fish and a beach-themed dining format, Captain D’s menu offerings include a wide variety of freshly prepared entrees, hand-battered fish fillets, grilled items, desserts and freshly brewed Southern-style sweet tea.

Sentinel senior partner John McCormack said: “Captain D’s holds a unique market position and was recently recognised as one of the top ten brands in America for consumer loyalty.

“Captain D’s continues to attract younger guests and is the clear category leader. Moreover, its same-store-sales growth over the past decade is in the very top QSR tier regardless of category.”

Commenting on the deal, Captain D’s CEO Phil Greifeld said: “Sentinel’s more than two decades of experience in the restaurant franchising sector makes the firm an ideal partner for us as we enter a new phase of expansion.”

Sentinel’s other restaurant investments include QSR franchisees of Taco Bell system, Pizza Hut and TGI Friday’s, a global franchisor of casual dining bar and grill restaurants, and many more.