A printed volume featuring an illustration or graphic of aquatic vertebrate animals on its external binding serves as a visual identifier. For instance, a novel about deep-sea exploration might utilize such imagery to immediately convey its thematic content to potential readers. This design choice acts as a form of non-verbal communication, signaling the book’s potential subject matter.
Employing this visual element can significantly enhance a publication’s appeal, particularly in genres where marine life or aquatic environments are central to the narrative or informational content. Historically, the use of such imagery has served to draw attention to works focusing on natural history, maritime adventures, or even allegorical tales where these creatures represent symbolic concepts. It leverages the inherent intrigue and aesthetic appeal associated with these animals.