Photorealistic Mongoose in an Underwater Cave

Photorealistic depiction of a mongoose exploring an illuminated underwater cave. The mongoose has damp, glossy brown fur, bright curious eyes, whiskers spread wide, and a slender, agile body gliding through clear turquoise water. Bubbles trail from its snout as light filters down from a jagged cave entrance, creating golden and blue caustics on rock and sand. Surrounding environment features rough limestone walls, hanging stalactites and stalagmites, patches of coral, sea fans, and faint bioluminescent algae glowing in crevices. Particles drift in the water, enhancing depth and realism. Shot from a slightly lower angle, with a shallow depth of field that keeps the mongoose in sharp focus while the background softly blurs. Ultra-realistic fur texture, water droplets clinging to fur, accurate light refraction, high dynamic range, cinematic lighting. Color palette primarily cool blues and teals with warm amber highlights for the light beams.