A cinematic image of a sinister merman with a maniacal grin, piercing yellow eyes, and skin in a natural human tone, exuding a haunting yet melancholy aura. His sculpted, humanoid features are dramatically highlighted by dynamic lighting, casting eerie shadows that dance across his face. The dark, moody background enhances his menacing presence, with subtle hints of aquatic elements weaving through the gloom like phantom whispers.