well, overall most of your pictures look great. i think your pictures look best when you dont use the flash. If the rest of the room is dark, and your fish tank lights are on, that is a good time to take a photo. You may already know this, but you can try using the macro setting on the camera for closeups. Holding down the shutter button halfway will also help the camera focus. Make sure your camera is taking pictures at its highest resolution. Try bringing photos into your thread at 800x600. That will show more detail than the 640x480 you have now. Never uprez your photos higher in photoshop because that will make them look grainy. Always start higher, then downrez if needed.
Your gorgonian still rocks.