This is an illustration of an anime-style character with a serene and whimsical atmosphere. The character appears to be a young girl with closed eyes and a peaceful expression, suggesting a moment of tranquility or daydreaming.  Her hair is black with a tinge of dark blue, long, and wavy, flowing around her as if underwater. Small flowers are scattered throughout her hair, and the motion of her hair gives the impression of gentle currents moving it.  The girl is dressed in a dark blue, almost navy, dress or coat adorned with lighter blue and white floral and aquatic-themed designs. The collar of her clothing is detailed with wave-like patterns and there seems to be a frilly lace or similar decorative trim at the edge. Her hands are clasped together near her face, holding an intricately detailed eye mask, featuring a similar aquatic motif with wavy lines and possibly pearls or beads as decoration.  The background is a rich, deep blue sea teeming with aquatic life. Various fish, including elegant koi, swim around and above her. Some fish are faintly depicted in the background, blending with cloud-like formations. There are also bubble patterns and crescent moon shapes interspersed within the design, enhancing the dreamy, underwater theme.  The overall color palette is dominated by shades of blue, with contrasting cream and white accents providing depth and detail. The attention to detail in the background, with various fish species and cloud wisps, creates a vibrant ecosystem surrounding the character.  The image conveys a calm and otherworldly dream-space where the boundary between the sky and the sea is blurred, encapsulating a surreal and poetic environment.