A new, bigger casino boat is scheduled to coast into Little River this morning. The boat, which will do business under the name Big M Casino, replaces the Southern Elegance casino boat. Another company, SunCruz Casino, will continue to operate out of the northern Horry County community. Under county zoning law, only two boats can operate out of Little River. Big M Casino company of Fort Myers Beach, Fla., and Southern Cruise Lines of Little River will operate the boat.