The village at Crystal River expanded greatly in size and permanence in Phase 2, which began sometime between around AD 200 and 300 and ended by around AD 500. This growth may have owed partially to a rise in sea level associated with the warmer temperatures of the Roman Warm Period, which might have made life on the seaward islands more difficult. The exchange of Hopewell exotics faded in this interval, but the societies of the Gulf Coast appear to have witnessed a fluorescence, as indicated by the widespread exchange of Swift Creek pottery and Weeden Island pottery. Crystal River was peripheral to these pottery traditions, but it may have been an important nexus between these and the Glades tradition of southern Florida, specifically with regard to the exchange of craft goods manufactured from marine shell. The gulf coast fluorescence is also indicated by a heightened pace of the construction of mounds. At Crystal River, three small platform mounds were initiated in this interval, clearly differentiating it from its peers in the region.