About
Males can be recognised by the patch of bristles on the sides of the body. Females and juveniles lack these bristlesMales are blackish-blue to brown with many blue lines and spots, and a broad pale band from the eye to a large toothbrush-like patch of bristles on the side. Females are yellowish-brown to brown usually with scattered pale blotches and darker brown spots on the sides. The caudal peduncle lacks spines