Wow, never saw them diving for anything, a good natural history moment. You had harsh light, evident in the white shoulders. but a very good catch nonetheless.
I wish for a little more room to the right and to be able to apreciate this one a bit larger :) I like the natural moment here, the pose, the drops are a big plus, I would try to tone down the rocks from the BG. Still, Lovely image! Congratulations!