O Sea, a popular seafood spot in Orange, to close this month
Opening in 2021 in Old Towne Orange, O Sea will close its doors for good, with its final service slated for Thursday, April 30.
King's Seafood Company, a Costa Mesa-based restaurant group, acquired the O Sea brand and its intellectual property. O Sea founder Mike Flynn will move into a senior role at the company as vice president of culinary and brand development, while the restaurant’s general manager Sarah Everett will take on a leadership training and development role within the organization.
"This is a proud and full-circle moment," said Sam King, founder of King's Seafood Company, in a written release. “Mike began his career with us early on, and it's incredibly meaningful to welcome him back in a leadership role. His creativity, perspective, and commitment to quality are in complete alignment with our company's values and will be invaluable as we continue to evolve our brands and invest in the future of our organization.”
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O Sea staff will be offered the chance to interview for jobs within King’s Seafood Company’s portfolio of restaurants, which include Water Grill, King's Fish House, 555 East Steakhouse, Lou and Mickey's, Meat on Ocean and Pier Burger.
"I'm incredibly proud of what our team built with O Sea," said Flynn in the same release. "Joining King's Seafood Company is an exciting next chapter and an opportunity to bring our ideas and experience into a broader platform. It's an honor to rejoin an organization that played such an important role in my early career."
Flynn opened the seafood spot (the name a playful riff on “OC”) on Glassell Street in June of 2021. It built a following for such inventive dishes as Oaxacan hot shrimp and ahi crispy rice alongside its adherence to sustainable practices.
“My deep passion for responsible coastal cuisine led me to develop this concept, which has been designed to make seafood approachable, contemporary and just plain fun for our guests,” Flynn said in a 2021 “Orange County Register” interview.
There are no plans to reopen O Sea at another location. It remains unclear what will replace the Glassell Street space once O Sea shutters.
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This story was originally published April 14, 2026 at 11:24 AM.