I am so glad for getting a conversation going, thanks to all who is contributing and thanks for the compliments.
I Steve I am now using the D300 and operate if exactly as you descripted with reference to focusing. I think where I need much more practise is in the re-composing. In our water (well at least in the shore dives i do most often) there is a fair amount of under current to work with. So even for stationary objects I find it hard to get that which i what to be in focus, sharp if I re-compose. In the time it takes to do that I will in most case have been move by the wave action. How do you deal/compensate for that? Had when it come to moving objects its obviously much more difficult.
So lets take the that shark photo you have edited. Say I wanted to re-compose that shot by moving the camera slightly to the right and tilting it down so that the eye would be more in the top left corner. How would you do that to give you the best chance to keep the eye in focus?
As for the white balancing, I agree with aquaplane. We do get some blue water, but its rare. So even when the viz is good the water tends to be green and I prefer to protray it like that. I would love to have some deep blue backgrounds but for that i need to travel;)
Steve these are Seven gill Cow Sharks. As you might have seen in some other threads here, we are pretty lucky down here to have a site which can easily be dived as a shore dive and find these beauties there on a regular basis.
Karl, I also noticed the shape of the lips, but you have described it perfectly:)
Aquaplane, i think compositioning can be a very personal taste (that being said there are times when i think most will agree what is a good composition and what is not) Personally I would have loved to had beter compositions for 1, 3 & 5, but I am farely happy with 4 & 6.
Still I can't stress how i value all the feedback as it helps me too not only take a second look and see other aspects, but also gives me insite in what other think.