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D. Marcus Elieser Bloch's, ausübenden Arztes zu Berlin. Atlas. Berlin, Auf Kosten des Verfassers, und in Commission in der Buchhandlung der Realschule,1783-1785, fishes, germany, ichthyology, pictorial works, gasterosteus aculeatus, gasterosteus, pungitius taxonomy binomial gasterosteus, spinachia taxonomy binomial perca, cernua., The illustration features a detailed depiction of various fish species, elegantly labeled with their scientific names. At the top, ''Gasterosteus Spinachia'' showcases a slender fish with a streamlined body. Below it, ''Perca Cernua'' is illustrated with a more robust form and prominent lateral lines, indicative of its habitat in freshwater. To the left, ''Gasterosteus Aculeatus'' is presented, characterized by small size and delicate features. Lastly, the bottom right features ''Gasterosteus Pungitius, ' noted for its distinctive shape and spikes. Each specimen is rendered with precision, highlighting their unique anatomical features and showcasing the diversity of aquatic life. (Photo by: Sepia Times/Universal Images Group via Getty Images)