Art does not have to be visually pleasing, or even that technically difficult, but it should always be thought-provoking. Yes, this is my definition of art. If it manages only one of these things, it might still be art, but sort of...meh.
I find this to be very borderline. I suppose it does provoke some thought, but what? Is he (or she?) trying to convey a message with the naked bodies, or are they totally gratuitous? Is the technique amateurish on purpose? If so, why? If not, is that interfering with a possible intended message or idea? Is it a matter of lack of vision or lack of skill to achieve that vision?
Art can quite often be uncomfortable, and these most certainly are, though mostly because I can't discern any purpose to the nudity other than shock value, or edginess for its own sake. So they're naked and in weird positions. So what? Are we supposed to confront something about ourselves with these images? Are we supposed to acknowledge a discomfort or disconnect with the human body? Um...don't we already know that? And why should we confront it? To what end, what goal? For the ones taken in the water or on rocks, I can almost see a sort of "vulnerable humanity in nature" kind of theme. But it's really a stretch to come up with something.
Art should always be thought-provoking, but if those thoughts consist of, "Huh?" and then a bunch of mental gymnastics to come up with the most tenuous conclusion, then it's not successful art.
So, by my definition, is it art? Well. As stand-alone images, it is doubtful. As a portfolio of work, it's slightly more successful...but just by the skin of its teeth. I think it's visually distasteful for no good reason, its message - if there is one - is possibly hindered by the amateurish photographic techniques, and it is only barely thought-provoking, provided we concede that 'thought' includes giving the benefit of the doubt and trying really hard to fill in the gaps.