What I see in this photo is the lack of detail in the rock, colours are rather flat there and it looks like if the rock was cut out and pasted onto the sea, which looks very blue to me.
I really like the way the land looks like it slices through the water. The focus is super crisp and the composition is very nice. One pet peeve of mine is a titlted horizon. While you don't have a strong tilt, its there. Its probably not even noticeable if you're not looking for it. Great color saturation and exposed very well.