A cinematic portrait of a sinister merman with wild, untamed hair and a maniacal grin, his piercing yellow eyes glowing against his human-like skin. His expression is both haunting and melancholic, capturing the duality of his nature. Dynamic lighting casts dramatic shadows across his face, accentuating his otherworldly features. The dark, swirling background suggests a murky underwater realm, enhancing the sinister atmosphere of the scene.