This is Taiwan’s first sea slug identification book published in English. It describes more than 400 species of sea slugs—from distinct orders such as Cephalaspidea, Sacoglossa, Anaspidea, Pleurobranchidea, and Nudibranchia—that are found around Taiwan and its nearby islands, including Kinmen, Green Island, Hsiao Lu Chiao , and Dongsha Atoll. With vivid underwater photographs to hold the reader’s interest, this book is the perfect combination of natural beauty and science education, helping readers understand the biodiversity of sea slugs around Taiwan and its neighboring islands.