I was referring to the giant green in your flickr account which is a very exciting shot. If you have have these sorts of opportunities open to you above the surface of the water imagine what kind of shots you could get immersed in their environment. I've never been in a tide pool that offered much more than a few of the less exciting mollusks and a few barnacles. Underwater photography offers a whole new set of challenges that I am sure you would find both entertaining and rewarding. How often do you get to dive?