Visualize an elegant and striking vector art composition featuring two koi fish gracefully encircling each other in a yin-yang formation. The koi should have shimmering scales with a smooth rainbow gradient transitioning from neon pink and blue at the head to bright greens and yellows toward the tail, emphasizing their flowing forms. Surround the koi with abstract, flowing waves inspired by Japanese minimalist art, defined by bold black outlines that add structure and contrast. Interspersed among the waves are luminous cosmic elements, such as tiny planets, glowing stars, and crescent moons, rendered in vibrant neon hues that complement the koi’s colors. Anchor the composition with vibrant cherry blossoms and lotus blooms, strategically placed to add depth and a natural touch without overwhelming the design. The flowers should have delicate gradients and subtle highlights, enhancing the overall elegance of the piece. Ensure the artwork has a transparent background with crisp, clear outlines, making it versatile for various applications. Aim for a balanced composition that harmonizes the serene beauty of koi fish with cosmic wonder and natural elegance."