This means locals and tourists may have the opportunity to witness this awe-inspiring neon-blue “sea sparkle” at Dickinson Bayou in March. This natural lighting event is very rare. Locals who have lived in the region for three decades have never witnessed it before. So, if you are in the area, ensure to catch a glimpse of a once-in-a-lifetime phenomenon. Unfortunately, this phenomenon may also indicate an underlying problem, as prolonged warmer temperatures cause coral bleaching.