coloring book. a hand-drawn terrapin, water turtle. monochrome simple doodle

abstract amphibian animal aquatic art artistic book cartoon character coloring creature cute decoration decorative design doodle drawing drawn elegance engraving exotic fantasy graphic handdrawn illustration isolated line marine monochrome nature ocean ornament ornamental outline pattern pet reptile sea shell sign silhouette simple sketch slow style symbol tattoo terrapin tortoise tropical turtle vector water wild wildlife