mermaid, blue scales, teal, green hair, one mutated crab arm, style of keita amemiya, (katsuya terada:1.1), (yoji shinkawa:1.1), 2d concept art, painterly, detailed lines, (black outlines:1.2), (ink brush:1.1), crisp, sharp, jagged, impressionistic, defined, high contrast, chiaroscuro, rough, masterpiece, ultradetailed