These little guys never seem to stay still for very long, so when I clocked this Scarus Globiceps - Violet lined Parrotfish; having a grooming session, I wasn’t about to pass up the golden opportunity for a close up upon the parrot fish's eye.

Notice that in this shot the camera movement through both the X & Y axis’s are miniscule so not to attract to much attention to the camera. The shot is composed ensuring that there is enough negative space for the subject to be able to move or to swim further into the shot.

An important point to bear in mind as an underwater imager for numerous reason – not least being your safety and well being; is your depth. If you maintain consistent depth instead of see-saw or saw tooth diving you can actually make your life as an underwater imager much simpler. For example if I take a shot I have adjusted my exposure and white balance for that shot at that depth, if I maintain a consistent depth and then the preparation and adjustments for the next shot should be minimal, meaning I can be ready to capture unexpected moments so much more quickly with minimum adjustments to my previous camera settings.