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Smiling JOe

SoWal Expert
Nov 18, 2004
31,644
1,773
I've seen phosphorus light up the water in Cape San Blas (Bay side) when paddles push through the water, turning the water Lightning-Bug Hyper Green. However, until last night, I've never seen anything of the likes in South Walton. Went to the beach last night around 830pm, at Grayton. The stars were incredible, as the Moon had not yet appeared. Looking down at the sand where the water was washing on shore, we noticed what looked like stars, shining on the sand, but it wasn't reflections. Whatever it was, was glowing in the dark, like stars on the beach. I thought at first, maybe it is little sea shells which are full of phosphorus, because the glow lasted only for a second or two, before it seemingly disappeared under the sand. I trapped one glow in the dark spec, and examined it under the light. It looked like a very very tiny white fleck. I removed it from the light and it was still glowing green. I'm guessing the waves produced enough friction that the little flecks would glow, but when the wave went back out, the glowing stopped. Does anyone have a better idea of what we saw last night? Ever seen this here? It was magical.
 

BeachSiO2

Beach Fanatic
Jun 16, 2006
3,294
737
I am pretty sure I know what they are and have seen them at Grayton also. They are a type of plankton (most likely dinoflagellates) and the bioluminescence you are seeing is a defense mechanism.
 

upstatefl

Beach Comber
Jan 16, 2008
14
1
Good morning. sorry we didn't notice the spec's but we did talk about the stars being so nice .We had just left the beach around 8:25 in the only car on the beach,yes car Subaru. We had the best time on the beach last night. Any way wish we met you im here on sowal a lot but just lurke:blush:
 

Smiling JOe

SoWal Expert
Nov 18, 2004
31,644
1,773
I am pretty sure I know what they are and have seen them at Grayton also. They are a type of plankton (most likely dinoflagellates) and the bioluminescence you are seeing is a defense mechanism.

Never heard of dinoflagellates, until now. Had to look them up. I read one statement that mentioned when the dinoflagellates reproduce in great numbers, it can lead to RedTide. I'll have to read more about that, as I only glanced at it. Not sure if was meaning that the conditions for thriving dinoflagellates and RedTide presence were the same, or if there was a cause and effect.
 

BeachSiO2

Beach Fanatic
Jun 16, 2006
3,294
737
Happens every year but usually in June. It hasn't happened in the past years due to dredging and IMO that is what is also causing the red tides.

I was going to question you on how you came up with this but then I noticed the three key letters above. :D I hope everyone realizes which member of your family is the expert on this subject. ;-)
 

BeachSiO2

Beach Fanatic
Jun 16, 2006
3,294
737
Never heard of dinoflagellates, until now. Had to look them up. I read one statement that mentioned when the dinoflagellates reproduce in great numbers, it can lead to RedTide. I'll have to read more about that, as I only glanced at it. Not sure if was meaning that the conditions for thriving dinoflagellates and RedTide presence were the same, or if there was a cause and effect.

Red tide is caused by a type of dinoflagellates, but not all dinoflagellates cause red tides.
 
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