A breathtaking and mystical fantasy digital illustration featuring a massive humpback whale swimming gracefully through the depths of the cosmos. The whale's body is intricately detailed with glowing star constellations, cosmic dust, and swirling mini-galaxies that emit a bright blue light. It glides through a deep indigo space filled with countless shimmering stars and faint line connections of stellar charts. In the upper right corner, a luminous full moon casts a cool light across the scene, while the bottom of the frame is lined with dense, dramatic cosmic clouds glowing softly from internal star systems, creating a surreal and wondrous celestial dreamscape.