0 adventure-blue-dark-blue-turquoise-mystery-curiosity-excitement-intrigue-wonder-determination-awe-book-cover-ideas-with-light-danger-waves-ocean-ship-coral-marine-creatures-coral-reefs-nautilus-explorer-outfit-28baf1e2a1 This cover design captures the essence of deep-sea adventure and mystery. The deep blue background and gradients represent the vastness and depth of the sea, while the faint rays of light symbolize hope and discovery. Coral's ship, with its futuristic design and soft blue glow, showcases the modern and mystical elements of the story. Coral herself, dressed in her explorer's outfit, reflects determination and curiosity. The underwater world and the ghostly image of the Nautilus add a sense of mystery and intrigue. The bold, metallic or glowing typography stands out against the ocean backdrop, adding to the adventurous tone of the cover. The choice of high-quality paper stock with a matte finish enhances the visual richness and depth of the design.