Photorealistic Scientist in an Underwater Cave Expedition

Photorealistic image of a scientist in an underwater cave. A diver wears a sleek drysuit with a full-face mask and compact SCUBA gear, a waterproof tablet in a sealed case strapped to the chest, and a headlamp cutting through the gloom. The cave walls are jagged limestone with stalactites and stalagmites, a sandy floor, and patches of coral. Sunlight pierces from a distant opening, creating blue-green light beams that illuminate suspended particles. Bioluminescent organisms glow along the walls as the scientist carefully collects samples with a tool and takes notes on a slate or tablet, with realistic light refraction, bubbles, and gentle water motion.