A luminescent sea dragon swims gracefully in deep, dark waters

A luminescent sea dragon swims gracefully in deep, dark waters. Its elongated, serpentine body is covered in scales that glow in shades of blue and green, creating a soft illumination effect. Its large, deep blue eyes emit an ethereal glow. Long, slender tentacles move gracefully around it, producing luminous waves that light up the dark waters. The environment is mysterious and magical, with a sense of tranquility and underwater wonder.