Adam,
I would retake this image with the notion that photography is a process of exclusion rather than addition.
Keep an eye on the corners of the image to make sure there are no distractions.
Avoid highlights or disorganization from algae or debris.
Treat shadows like objects.
I concur with boosting the colors remembering that colors are perceived and not real and if you can boost them enough without creating the notion that what is being viewed is over edited then you will be OK.
Velvia film did this 17 years ago and became the mainstay of many nature photographers.
I would experiment with shooting the clown fish on the diagonal and placing the fish in different regions of the frame. The human brain tends to notice diagonals more.
Your type of camera has amazing depth of field but when possible with SLRs keeping the clown's body parallel to the camera back helps sharpen things up.
I know this sounds crazy but I would go back to this site 100 times and shoot it over and over again until you understand these two creature's relationship. Eventually something different and compelling will happen and you will capture it.
Anemone and clown fish images have become very cliche but I never get tired of seeing a powerful image of them. I hope this helps. Thanks for sharing. vr Andy