Thanks for posting this image and welcome. Underwater photography is very difficult and it takes a lot of experience and a bit of good fortune to get great images. For me, this one is in the just Ok basket, because it has varying elements which are in focus, which often is so hard to do underwater.
If you take away your own emotional element involved in the photo, and look at it objectively as if someone else had taken it, what does the image do for you? There is nothing really spectacular taking 'centre stage' of the image. The coral bommie in the foreground is not in focus, which is fine, but is takes up such a big portion of the image and is ugly. The blue 'veins' on the coral are really interesting, so could have been an opportunity to create an interesting image up closer. The texture on the mustard coloured sponges? is really interesting but gets lost in the whole image.
Because underwater photography is so difficult, one often thinks an image is better than it is. Look at the image as if it were a landscape and see whether the elements work together to 'say' anything. If they don't...it is just a happy snap.
I would suggest having a look at http://wetpixel.com
and see some of the underwater photography there. Please don't be discouraged by my honest thoughts. They are of course only my opinions. I find the best part of underwater photography is actually being in the ocean, and I too have folders of happy snaps.