A magical surreal Niji style artwork, featuring a close-up face of a mermaid, illuminated by green hues. The scene is set in a fantastical underwater world, with whimsical sea creatures and vibrant coral reefs in the background. The mermaid's face is prominently displayed, her eyes and features highlighted with green accents, creating a dynamic and enchanting composition. The lighting is surreal, with green tones casting a dreamlike and mystical atmosphere.