RAW newb. Some results:

[Logzor]

Ok here is a FTS done with raw - TIFF export - and a few changes in raw editing:

Here is non raw with the same photoshop editing to get the colors as close as possible to true to life:

 

[dendronepthya]

Image -> Edit -> Remove Fish

Just kidding. Looks good.

 

[Slakker]

The RAW shot seems to have much more vibrant color representation. Is the shot noticeably truer to your perception of the tank, or is it kind of a 6 of one, half a dozen of the other sort of a thing?

Personally, I think the RAW image looks better, I'm just wondering if you feel it's more accurate than the JPEG version or if it's primarily because the two shots were taken with so much time in between that the corals actually had time to develop better/different coloration.