An ancient rusted anchor lying on the ocean floor, partially buried between large rocks and surrounded by swaying sea plants. Its surface is encrusted with coral, algae, and barnacles. Scattered around the anchor are pirate treasures: gold coins, jeweled rings, and a broken chest spilling pearls. A mysterious glowing blue light shines near the anchor, casting shimmering patterns on the sand and rocks. Realistic underwater setting, fantasy adventure style, high detail, moody and cinematic lighting.