Ultra realistic underwater fantasy photograph, 4:5 vertical. An ornate throne made entirely of living coral, sitting on white sand on the ocean floor in shallow tropical water. MATERIAL PHYSICS — CORAL THRONE: The throne is approximately 5 feet tall — a high-backed ceremonial seat. It is not carved coral — it is GROWN coral. Different species of living coral form different parts of the structure: - Backrest: Branching red organ-pipe coral (Tubipora musica) forms the tall back — hundreds of thin red tubes bundled together, some branching outward at the top like a crown - Armrests: Massive brain coral (Diploria) forms each armrest — the characteristic labyrinthine groove pattern visible on the rounded surfaces, pale tan with green-brown valleys - Seat: A flat plate of table coral (Acropora) creates the seat surface — thin, flat, slightly concave, pale brown - Legs: Four thick pillar coral (Dendrogyra) supports — cylindrical, grey-brown with fine polyp texture visible The coral is ALIVE — tiny polyps are extended on some surfaces, visible as small translucent tentacle clusters. The colors are natural, not day-glo — muted reds, tans, browns, pale greens. This is real reef color, not cartoon reef color. MATERIAL PHYSICS — WATER: Shallow tropical water approximately 15 feet deep — warm, clear, turquoise. The turquoise color comes from white sand reflecting sunlight upward through the water column. Visibility is 80+ feet. The water has slight particulate — not murky, but enough to show the sunlight shafts as slightly brighter diagonal beams entering from the surface above. MATERIAL PHYSICS — LIGHT: Shafts of tropical sunlight penetrate the surface above — three major shafts visible as bright diagonal beams, the edges defined by the particulate in the water. Where a shaft hits the throne, the coral surfaces are brightly lit and their colors saturate. Where the throne is between shafts, the coral is lit by softer ambient underwater light — bluer, dimmer. Caustic light patterns (the dancing ripple-refraction pattern from surface waves) play across the white sand floor around the throne — constantly moving bright lines. MARINE LIFE: A small school of blue chromis (10-12 tiny bright blue fish) hover near the throne's backrest. A single larger angelfish (Emperor angelfish — blue and yellow stripes) passes at the left edge of frame. A sea fan (purple gorgonian) grows from the sand beside the throne, waving slightly in the current. CAMERA: Underwater housing, Nikon Z8, 15mm rectilinear wide angle, f/5.6, ISO 400. Natural light only — no strobes. NEGATIVE PROMPT: person, diver, crown, dark water, murky, deep ocean, cartoon, text, watermark.