In recent years, global concern has grown regarding the degradation of marine ecosystems. Humanity has greatly benefited from the oceans, underscoring the constant need for restoration and conservation of marine ecosystems. International cooperation is essential for protecting the oceans, with Japan, an island nation surrounded by the sea, playing a crucial role in marine environmental conservation. For the sustainable use of marine resources and the preservation of marine environments, comprehensive measures are important. Particularly, marine biology education for the next generation holds great importance. Here, we report a detailed case study on the creation of a scientific picture book about marine organisms in Japan and its feedback. The book explores the theme of mutual symbiosis among marine organisms, aiming through illustrations and storytelling to help children understand the complexities of marine life. It focuses on the symbiotic relationship between hermit crabs and sea anemones. The picture book was developed based on scientific literature survey and specimen observation. Positive feedback from readers highlights how effectively the picture book conveys educational content on marine biology, suggesting the potential of science picture books as powerful tools in educational outreach and environmental conservation efforts. This report discusses the creative process, the educational impact of the picture book, and offers valuable insights into the use of visual arts and narrative in science education.