A breathtaking panoramic view captures a mesmerizing and perilous Siren mermaid, her extraordinarily long and intricate Betta splendens tail flowing gracefully. She hovers in the mysterious deep sea, surrounded by an array of vivid aquatic creatures. This scene is composed with impeccable elements and perfect symmetry, evoking the enchanting aesthetic of Ori and the Blind Forest, with an air of ethereal wonder.