Create a surreal underwater fantasy scene titled by mood rather than text, showing {argument name="scene concept" default="sea sprites in an enchanted aquarium grotto"}. Use a vertical {argument name="aspect ratio" default="3:4"} composition with a deep emerald-green and electric cobalt-blue color palette. The viewpoint looks into a dark, plant-filled underwater tunnel with a glowing blue opening in the center background and shimmering caustic reflections scattered across the water surface like broken glass. Include exactly 10 clearly visible small translucent silver-blue fish, clustered mostly in the upper-left and left side, all facing right, with glossy bodies and bright blue fins. Include exactly 4 jellyfish: one medium translucent jellyfish floating near the middle-right, one larger jellyfish lower-right with long trailing tentacles, one small amber jellyfish partly cropped at the far right edge, and one partial amber jellyfish cropped at the far left edge near the lower third. Add 1 glassy, whimsical octopus sprite in the lower-left foreground with a transparent bulbous head, big round eyes, long curling tentacles, and tiny colorful pearl-like ornaments among its arms. Fill the bottom and side edges with dense coral-garden details: white branching coral, red and orange anemones, yellow-green sea plants, purple and pink flowers, and small sparkling highlights. The central blue water passage should remain open and luminous, with rippling reflected streaks leading inward. Style: hyper-detailed digital painting, magical realism, bioluminescent highlights, high contrast, glossy watery texture, painterly but sharp, dreamlike and ornate. No text, no frame, no watermark; keep the atmosphere mysterious, lush, and aquatic.