Crown Jellyfish Ascending in Midnight Water

A crown jellyfish ascends in still midnight water, tentacles spiraling gently, meditative and otherworldly. Bell is clear glassy silica-like, tendrils gelatinous with fine ribbing, microbubbles and faint silt specks glinting near the core. Depth layering is sparse particulate in the foreground, the jellyfish in the midplane, and a uniform abyssal backdrop; focus sits on the bell and inner tendrils; medium depth of field produces a soft falloff that preserves a clean silhouette and legible spiral structure. Illumination comes from internal biolum glow in cyan and teal with magenta edge dispersion, plus a faint cool rim that separates forms from the background; grading is cool with restrained purples and deep crushed blacks. Environment is open water with subtle drifting marine snow and two thin tendril fragments to imply motion, and no additional fauna. Camera is eye-level with a short-tele FOV, centered vertical composition inside a 16:9 crop, geometric emphasis on a central helical column. Style is photoreal underwater macro blended with Octane path-traced CGI and micro-bokeh, rendered crisp with filmic contrast and slight halation. Reserve the top ~12% and both bottom corners as protected negative space consisting of soft, low-detail, background-matched areas; confine all luminous and detailed activity to the central field only.