Art Nouveau Ukiyo-e Underwater Linework

Create an enchanting underwater world coloring book page rendered in immaculate vector-quality black linework at 300 DPI. Employ varying line weights in a dynamic hieroglyphic ink style: bold 3-4pt outlines defining expansive coral reefs and aquatic silhouettes, balanced with 2pt midlines sculpting playful sea creatures and swaying kelp, and delicate 1pt filigree for intricate shell textures and bubbles. The composition flows with a rhythmic Art Nouveau elegance, embracing symmetrical coral arches and swirling water currents that guide the eye naturally across the page. Edge-to-edge frame adorned with classic Greek key motifs invites extra creativity. Ensure every enclosed shape is generously sized (no smaller than 5mm) for effortless coloring, harmonizing large restful zones with mesmerizing detailed pockets—ideal for young artists and stress relief. No shading or fills clutter the pristine white background; the result is a soothing, balanced tableau of oceanic calm captured in flawless brushstroke precision reminiscent of a traditional Ukiyo-e woodblock print merged with modern vector clarity.