I have to agree with jeremy, the colors on that rock are awesome, but its a little dissapointing that they are no where else.  Still, I like the simplistic and smooth look to it.

Very cool  May I suggest adding some of that awesome brown and green into the fish and bubbles? as it is, I feel they fade into the background a little (The refraction in the biggest bubble is awesome btw)

Rock is my favorite center of interest.

I think the edges are a bit rough though anyways looks neat....

Thanks Lollige, actually I didn't have any confidence to post it.. However, not trying means giving up.. So..just keep it fly like bubble lol

Very nice first entry :)