Acanthurus japonicus is a fish of the family Siganidae, the genus Acanthurus

Below is a picture of a Japanese spiny-tailed snapper, Acanthurus japonicus ? Acanthurus japonicus. The mouth is small, slightly protruding, and the body is dark blue, with a rough shark-like skin and a white area from under the eye to the end of the muzzle. The dorsal and anal fins are black with light blue trim, and the pectoral fins are yellow at the base. The caudal peduncle is yellow, with a stiff spine on each side, and the caudal fin is truncate, white, with a yellow horizontal band. The dorsal fin has 9 hard spines, the dorsal fin has 28 to 31 soft bars, the anal fin has 3 hard spines, and the anal fin has 26 to 29 soft bars. Body length up to 21 centimeters.

This fish is distributed in the western Pacific zone of India, including the waters of Indonesia, Taiwan, Japan, and the Philippines. This fish inhabits lagoons or reef areas, moving in small groups, and is herbivorous, feeding on algae. Large fish can be eaten, but also for ornamental purposes. When eating, it is fried half-cooked with shredded ginger and made into miso soup.

Acanthurus nigricans ? Acanthurus nigricans, commonly known as ? white-faced gill-tailed snapper, yellow-spotted gill-tailed fish, colorful hangers

The body of the fish is oval and laterally flattened. It is black in color with a white ring on the lower jaw. The head is small and the dorsal profile of the head is not particularly prominent. There is a large, slightly half-moon shaped white spot below the eye. Mouth small, terminal, with a row of flattened teeth in each upper and lower jaw, teeth fixed and immovable, margins notched. There is a longitudinal yellow band along the base of each of the dorsal and anal fins, widening as it goes back. The outer edges of the odd fins are bluish. The caudal fin is white, with a yellow band parallel to the inner blue band. The caudal peduncle spines are orange. There are 9 hard dorsal fin spines, 28 to 31 soft dorsal fin bars, 3 hard anal fin spines, and 26 to 28 soft anal fin bars. The body length is up to 17 centimeters.