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Red Sea sailfin tang
The Red Sea sailfin tang or Desjardin's sailfin tang (''Zebrasoma desjardinii'') is a marine reef tang in the fish family Acanthuridae.
==Description==
''Zebrasoma desjardinii'' grows to a maximum length of 40 cm (16 in), with a sexual dimorphism, as males being larger than females. This species shows the typical morphology of the family Acanthuridae. The body is oval or disc-shaped, with erectile and much elevated dorsal and anal fins. The coloration may vary from one individual to another and within the same individual, depending on age. In general, the upper side of the body alternates orange and dark blue vertical bands, with a larger blue band on the eyes, a spotted ventral region and numerous white spots on the head. The dorsal and anal fins have a pattern of horizontal alternate orange and blue bands. The caudal fin shows white spots and lines.
Like most surgeonfish on each side of the caudal fin, in the middle of the caudal peduncle, there is a defensive dark spine surrounded by a blue zone. This spine is hinged and may unfolds to 80°.
In respect of Zebrasoma veliferum, adult Red Sea Sailfin tang has a few less anal fin rays (22-24 instead of 23-26) and different marking on the tail. As a juvenile, they are almost indistinguishable in color and markings.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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