I came here on March 13, 2008 to try for some wide-angle, sensitive setting, natural light photos, but realised that with the less-than-ideal visibility (15-20 feet), they weren't as effective as I was hoping. I think I'll stick to normal-setting, strobe lit, colourful photos here from now on.
By the way, I had a closer look at the wolf eel dens at the second corner. I had to get down close and look with my light deep inside the dens, but I saw a bit of wolf eel tail in both of them. Maybe they are females guarding eggs (they are usually more reclusive at that time), but the males were nowhere to be seen. The males usually stand guard out at the entrance with their mouths wide open to scare off intruders.