Create a black and white coloring book page suitable for kids, portraying a cartoon-style scene of a hidden underwater city inhabited by graceful merfolk and illuminated by the soft glow of bioluminescent creatures. The underwater city should be depicted with simple and clean line art that captures its intricate architecture and otherworldly beauty. The merfolk should be shown going about their daily activities, with crisp black lines defining their flowing tails, expressive features, and underwater surroundings. Some merfolk can be seen exploring the city, while others engage in playful interactions. Illuminate the underwater city with the gentle light of bioluminescent creatures, such as glowing jellyfish, shimmering fish, and softly glowing plants. The details of these creatures should be captured using sharp lines that highlight their unique forms and the way they light up the city. The underwater flora should be hyper-detailed, with sharp lines defining the intricate patterns and textures of coral reefs, seagrasses, and other aquatic plants. The entire scene should exude an atmosphere of enchantment and tranquility, inviting young artists to add their own colors and bring the underwater world to life. Ensure that the line art is easy for children to follow and color within the lines, while maintaining a captivating and magical underwater realm that sparks creativity. no background, clean lines --ar 9:11 --q 0.5