A young adult European woman snorkeling in shallow crystal-clear tropical water. She is wearing only white patterned ankle socks and an open, soaking-wet blue denim jeans jacket. The jacket is water-saturated heavyweight denim, blue changed to deep navy and indigo, with substantially darker unevenly soaked patches, absorbed water, heavy wet folds, visible weave and stitching, and strong glossy specular reflections on the raised weave, seams, and creases. Her skin and hair are completely wet, glistening with water sheen. She is swimming horizontally, looking down at the seafloor, actively digging her bare feet into the sandy bottom. Perspective is from behind her, with her feet positioned toward the camera. Bright sunlight filters through the shallow water creating caustic light patterns on her body and the sand. Photorealistic, 8k resolution, highly detailed textures, realistic water refraction and light scattering.