Young girl resting Alexei Alexeivich Harlamoff (1840-1923)

The picture has something of this: people, nude, water, underwater, reclining, woman, swimming, tree, nature, recreation, side view, two, sea, daylight, mammal, fish.
Perhaps it’s a painting of a woman laying on the ground with her head down and her hands behind her back, in a wooded area with rocks and grass.