Next message: Fred Hebard: "Re: Glowing Sea Surface"
Trevor, there are many phosphorescent creatures in sea water. I've gone scuba diving on a moonless night and we played like wizards in Fantasia throwing fireballs as we moved when the dive lights were off.
But in answer to your direct question as to whether sea water itself emits light...The general answer we learned in oceanography is "no". Seawater does not glow at all, by itself. From physics and chemistry you can learn that there is some tritium in all water, and tritium does glow, but if you could never see that emission in normal seawater.
All you will see are the critters glowing, as they do when they are disturbed in any way. From "sparks" to "worms" and "blobs", but all critters, never the water itself.