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Here is something that I didn't know existed. The actually glowing of seawater. This happened one night on my way back down from Alaska. All along the sides of the ferry the water began to light up as if there was some bright blue flood lights shining from the front and rear of the boat. I asked one of the staff why they had lights on and he told me about the fact that the water has phosphorus in it and lights up when it is agitated. This image was at the rear of the boat when the water was being churned up by the propellers. 

This image has only been enhanced by increasing the brightness and contrast of the original.