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I haven't heard what the name of the phenomena is but we took a guided night dive (didn't need to be guided but otherwise we wouldn't have known about this) and we went out in the shallows by Alice and settled on the bottom and then turned the lights off. It was like an underwater fireworks display!!! The one element would go up, then a little string of them would blink several times as it falls back to the ground (this happening a million times all around us) Amazing!! I thought it was a crustacean spawn but I'm not sure - I'd love to hear the scientific explanation!!