I like it.
You might improve it by cropping it to square format. To me, a lot of that area behind the gulls detracts attention from the subject.
That railing in the background seems to be off-level, but the horizon and everything else in the picture seem to be right. I don't know what to make of that. Is the railing really not level, or is it maybe an effect of the lens you were using?
Nice work.