Most scientists believe we are products of the ocean. Perhaps that explains the captivating effect shorelines seem to have on us. I'm thinking that sharper focus would have yielded a higher c-index.
The color of this water is interesting - high mineral content perhaps? Yes, the ocean sounds and constant waves can be mesmerizing. I agree with Les - the focus could be sharper, (perhaps you enlarged it for posting and lost some clarity). There is a very slight tilt (look at the horizon in comparison to the top of the photo.