A cleared-and-stained fish specimen is prepared for research on the bone structure, phylogeny, evolution, and morphology of fish. Just like astronomers who wish to share the magnificent nebulae and starbursts with the world, biologists are interested in sharing the unbelievable world under the microscope. Similarly, the authors here are willing to publish their year-long research achievement for the public so that not only fascinating knowledge of fish can be passed down, but also the unique and beautiful creations of Mother Nature can widen humans’ horizons and enrich the cultivation of art.