Peter,
On my monitor the Arrow Blenny and the fairy baslett (side view) are very sharp. The shrimp is sharp at the eggs but soft at the eyes (I posted it to show the effect of focus). The fairy baslett (front view) is very soft but people seem to love it anyhow. It is actually the one most liked by non-photographers. Go figure. The juvinile drum is not the sharpest I took but the best pose.
One issue is that these were not sharpened for resizing for the web. Another is I think I like less sharpened photos than most of you. A third may well be I have a poor eye for sharpening.
Nevertheless, the Arrow Blenny is an awesome picture. On a glossy print the colors are vibrant and the fish stands out. On matt paper the background takes on a pastel look and the fish jumps off the page. Actually, the posted shot is not perfectly color-corrected. A more careful color correction yeilds even more outrageous colors but I am not sure I like it as well.
If you send me your email I will send you a full file for your analysis.
I was using the Ikelite 5505.46 port at f/18, 1/125, 1/100. The Arrow Blenny was shot with a woody's diopter.
Tom
Tomreynolds_ilan@yahoo.com