At the center of the scene, a happy mermaid glides through the water, her long hair trailing behind her. Right next to her, a friendly octopus waves its tentacles while a small fish swims nearby. On the ocean floor, an open treasure chest overflows with gold coins, surrounded by delicate seashells and a resting starfish.

The background is rich with detail, featuring tall stalks of seaweed and clusters of bumpy coral. Tiny bubbles rise toward the surface, adding a sense of movement to the water. Every corner of the page is filled with life, from the textured floor to the swirling patterns of the ocean plants, giving you many different elements to focus on as you color.

For the mermaid, you might choose a vibrant turquoise or a deep purple for her tail to make her stand out against the blue water. The treasure chest looks wonderful when colored with rich browns and bright yellow for the gold coins. Using a glitter pen for the coins can add a special touch of sparkle that mimics the look of real treasure.

Try using different shades of green for the seaweed and warm pinks or oranges for the coral. The octopus could be a bright red or orange to contrast with the cooler colors of the ocean. If you want to create a sense of depth, use lighter blues near the top of the page and darker blues as you get closer to the ocean floor.