I took more seahorse images. The first series are of the female (9-28-09):
On 10-6-09, I came across the male and it looks "fatter" than ever and hopefully soon to bear some fry.
On 10-7-09, I got out there before the winds picked up and initially, the vis was pretty good but some wave surge lifting the sand and moving all of the loose debris back and forth. I first encontered the female and after leaving her to her day, I came across the male.
As soon as you spot one of the seahorses and dive down for a close shot, they typically leave their roost if they had been stationary and your perspective and shot is that of the back while they are swimming away. If you are quick enough, you can try to get to the side of them for a shot but they are masters at quickly turning and presenting their back to you. The water was still enough that the female of her own accord let the sea floor shortly after I started shooting her and came up to the surface. When they switch to vertical mode, they slow down and are easier to follow but they still present their back to you for the most part.
I have found that one way to get a better shot at their side or face on is to hold the camera beyond them and now they have to choose whether to present their back to you or the camera. Guessing at the aim of the camera and focus on the seahorse is problematic though and the "background" questionable!
The seahorses are not the only inhabitants of the algae forest.
By the time I found the male, the surge had increased as had the wind. I believe he is "pregnant" and I don't want to disturb him any more than necessary in my desire to get a shot or two.