Keywords: Acanthostracion quadricornis.jpg Ostracion quadricornis <small> Linné </small> Acanthostracion quadricornis <small> Linnaeus 1758 </small> Scrawled Cowfish From plate 42 of Ernst Haeckel's Kunstformen der Natur 1904 creator Ernst Haeckel Public domain File Haeckel Ostraciontes jpg PD-old Kunstformen der Natur - derivative Acanthostracion quadricornis |