Now, of secondary concern is the circled highlight on the shoulder.
The primary light source seems to be coming from above the character, yet there is a pretty definite bright spot on the bottom of the shoulder muscle here. Now, a lot of light will be reflected back up from the water, but if that were really the case, then there would be more indications of it on the figure closer to the water (resulting in similar bright spots under the bicep, for example).
Rather than adding extra bright spots, however, I think the solution is to simply scale back how bright that spot on the shoulder is, making it brighter on the top of the shoulder and less prominent on the lower portion.
