Swamp Spirit by NatalieDeCorsair on DeviantArt

The Legend of the Fifolet! Tales of buried pirate treasure are prevalent in the South, especially in Louisiana. As tradition states, before a pirate such as William Kidd or Jean Lafitte would bury their treasure, they would kill a member of their own crew to throw into the hole along with the chest. Doing so would bind the slain man's spirit to the treasure, restlessly guarding the hoard.. It is a warning, a spirit, and sometimes the restless soul of the dead. For generations, Cajun families told stories of the Feu-Follet to explain mysterious swamp lights and to caution children and travelers about the dangers of wandering into marshland at night. The legend continues to survive because it is deeply tied to both faith and landscape.

Finally there is the feu follet (also fifolet), or will-o'-the-wisp - mysterious lights seen in the swamp. Cajun folklore is filled with stories about dancing lights enticing doomed people into the swamp, where they become disoriented and drown. Some believe the feu follet are a naturally occurring phenomena known as "swamp gas.". According to Cajun folklore, the fifolet is said to be the ghostly spirit of a person who died a violent death, either by drowning in the swamps or through some other tragic event. The fifolet is said to lure people away from safety, leading them deep into the swamp where they become lost, disoriented, and eventually meet a similarly tragic end.