I really like the composition and the light on this. It's a really great graphical sort of shot - the stick clearly holding the position of first interest, but then these beautiful symmetrical lines leading the eyes out towards the rest of the rest of the image.
If I had one critique, it would be that I wish the depth of field were a smidge deeper - not a lot, but maybe just 1-2 clicks stopped down. And I say this as someone who adores shallow depth of field, but I think this one needs just a tiny bit more for two reasons. First, with such a shallow depth of field, the focal point is really important. I feel the focus should be square on the tip of the stick, but viewing the image full-size, it seems like the focus is a bit down and to the left of the stick. (Someone with better eyes can confirm or deny, perhaps?)
Second, the image is really strong graphically, but I'd love to see a bit more of the mix of textures of the rock, the stick, and the foam. I think a slightly deeper depth of field would have brought out more texture in the different elements instead of smoothing them out.
But let me say again, that I really really like the shot and the above is really a minor critique. All the important stuff is there. The rest is just refinement.