Submerged in the deep blue depths, a magnificent steampunk submarine named the Nautilus glides gracefully, its brass and copper hull gleaming under the muted underwater light. Propellers spin silently, leaving trails of gentle bubbles in its wake. Ornate portholes cast a warm glow from the interior, hinting at the mysterious adventures within. Elaborate gears and mechanical appendages adorn its sides, adding to its fantastical charm. Schools of curious fish swim alongside, their scales shimmering like jewels against the submarine's intricate design, as seaweed sways rhythmically in the ocean current.