Aleya

Aleya is the name given to an unexplained strange light phenomena occurring over the marshes as observed by the Bengali people, especially the fishermen of West Bengal and Bangladesh. According to fishermen, these ghost lights have the power to distract, waylay, and even compel victims to drowning, but have also proven useful as navigational aids.

In 2013, researchers at Abstergo Industries suggested paying more attention to the ghost lights, believing that they may have a connection to the First Civilization.

Reference

 * Assassin's Creed IV: Black Flag