Could sea turtles survive in freshwater?

When in captivity, sea turtles should be maintained in water with a salinity level falling within a range of that of normal, natural, incoming seawater. Short periods of holding sea turtles in fresh water can be tolerated and are useful when prescribed by a veterinarian, e.g., to remove parasites and fouling epibiota such as barnacles. However, prolonged periods in fresh water should not be encouraged. Sea turtles are meant for life in the sea, so they do best in an environment with a similar salinity.