About this species

In adults, females are a green/yellow colour and males are green/blue. The species gets its common name from the black spot that is found (in most individuals) on the upper body towards the rear of the dorsal fin. Each scale on the body has a vivid blue vertical line on the trailing edge. This line changes into a horizontal bar towards the tail, which roughly join producing horizontal bands along the base of the tail. A blue line is also present beginning at the upper mouth, crossing the eye and ending at the gills. Read more…