I keep dreaming about the plankton bloom at midnight

I'm standing on the dock and the water is glowing, not bioluminescent sparkle but a solid, patient light, like someone left the moon on the surface. The bloom is so thick I can't see the fish below, and I'm trying to explain to someone that this is a bad sign, but my voice comes out as bubbles. Then I wake up and check the water temperature data like it's a guilty conscience.