S.C. Code Ann. § 50-5-75

The waters and bottoms of the bays, rivers, creeks, and marshes within this State or within the territorial sea as shown on applicable NOAA Charts, not heretofore conveyed by grant from the General Assembly or royal grant are and remain as a common for the people of this State for the taking of fish, subject to the provisions of this chapter and any future act that may be passed, except that this section is not intended to regulate fish or fishing in the freshwaters of this State.