صفحة تلوين: عالم تحت الماء الساحر

Create a detailed coloring book page featuring an enchanted underwater world. Pure black outlines on white background — no shading, no grey, no color fills. Clean line art only. Include: a majestic sea turtle as the centerpiece, surrounded by tropical fish of various shapes, octopus with curling tentacles, seahorses, jellyfish with flowing tendrils, starfish, sea anemones, coral formations with intricate textures, seaweed swaying, bubbles rising, sunlight rays coming from above, and a treasure chest half-buried in sand. Every creature and plant filled with intricate decorative patterns inside (mandala-style). Decorative wave border around the page. Adult coloring book style, printable, 300 DPI, highly detailed line art, black and white only.