At the dusk, the marshes of West Bengal might be eerie, but one phenomenon, in particular, frightens local fishermen. Unnatural glowing lights of various colours have been seen hovering over West Bengal's marshes on numerous occasions. For many years, these lights have been referred to as 'Aleya Lights,' and they are a nightmare for fishermen since they frequently confuse them and cause them to lose their bearings. A various fisherman has lost their life as a result of these odd lights in a number of cases reported to date. These lights, according to scientists, are simply methane ionisation above the marshes, which arises from the decaying organic matter that is present in these bogs.