Ooooh, very cool, at first glance I thought these were the Dementors from Harry Potter, or the ghost king from Lord of the Rings. I love the creepiness element, and the greeny effect which gives you the impression that they are underwater. And they are. It is very effective, well done I love it.
You have really great use of gesture and light in your work, and they are all so full of movement! Love the limited color palette. The use of grays, greens and soft warms are quite unique. You also have a way of using computer programs look like traditional painting tools. Way dig, keep up the good work!