Jared wrote: At least the topic question got answered.

Yeah...sorry I asked.    I mean, thanks.

On that google search, I've probably read the first 20 articles it lists.  Although that was a year ago, and I've only read a couple new papers since.  Most of my new info is from Mazel and Dana. 

Like Jon, I'm out of info knowledge, but still can't answer my own questions.

Adam

My knowledge of photosynthesis is spent at this point .  Have you done a literature search?  Google shows lots of hits:  http://scholar.google.com/scholar?hl=en&safe=off&q=c oral+fluorescence&spell=1 but I'm sure the searches at the university would be even better.

Jon and Jared-
It is possible, that is why asked Mazel, who confirms that they are not fluorescing.  He may be wrong, but since he is the world authority here I'll trust him.
So corals (in general) that fluoresce take blue light and give off green.  But zooxanthellae and chlorophyll take blue light and give off red.  So house plants glow red, cabbage does, trees do, algae does.  So it is really easy to see what is fluorescing from chlorophyll.

It is possible that we just aren't seeing it, and yes corals do fluoresce at other wavelenghts.  But I'd say about 98% of the coral fluorescence is taking blue, giving off green and orange. 

But I still can't figure out why corals fluoresce.  Is there an advantage to it, and what is that advantage?

Oh, and I'm still wondering if anyone believes that corals are emitting energy as heat and are therefore warm on side of the coral (near the light) but cool on the other side (bottom or shaded side).

Adam