About Siganus unimaculatus (Evermann & Seale, 1907)
Siganus unimaculatus, commonly called the blotched foxface, has a compressed body, where its body depth is 1.9 times its standard length. The dorsal profile of the head is steep up to the rear of the eye, and there is an indentation between the eyes. The caudal fin is forked. Like all rabbitfishes, its dorsal fin has 13 spines and 10 soft rays, while the anal fin has 7 spines and 9 soft rays. The fin spines contain venom glands. This species reaches a maximum total length of 20 cm, or 7.9 inches. Its body is mostly bright yellow, with the head and front portion of the body being white. A black band runs from the mouth to the start of the dorsal fin, and a second black band extends from the shoulder to the chest. There is an irregular black spot or blotch on the upper flanks, from the center to the rear of the body. The blotched foxface has two separate, disjunct populations. The northern population occurs in the Western Pacific Ocean, ranging from Japan's Ryukyu and Ogasawara Islands to the Philippines. The southern population is restricted to the Rowley Shoals in the Timor Sea, off the coast of northwestern Australia. This species inhabits shallow waters down to a depth of 14 m, or 46 ft. It is found on coral reefs formed by Acropora and Porites corals, and also on areas of coral rubble.
