A packaged shellfish product and a process for producing the shellfish are provided by the invention. The shellfish is heat-treated to partially cook the shellfish followed by rapid cooling to stop the cooking process. The partially cooked shellfish is then packaged in a sealed container and heated for sufficient time and temperature to fully cook the shellfish. The resulting packaged shellfish has an extended refrigerated shelf life. In one embodiment, the packaged shellfish is stable for about 45-60 days without loss of flavor or texture.