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Hump-backed Unicorn Tang

(Naso tonganus)
Naso tonganus, commonly known as the humpback unicornfish or Barcheek unicornfish, is a species of marine fish belonging to the family Acanthuridae, which includes the surgeonfishes and tangs. Here are some key characteristics and information about this species:
  1. Appearance: The humpback unicornfish is named for its distinctive appearance. It has a laterally compressed body and a prominent hump on its head, which becomes more pronounced as the fish matures. The body is generally bluish-gray to greenish with a yellowish hue, and it has a dark spot at the base of the pectoral fin. The most notable feature is the “unicorn-like” horn extending from the forehead, which is characteristic of unicornfishes.
  2. Size: They can grow up to about 45 cm (18 inches) in length.
  3. Distribution: Naso tonganus is found in the tropical waters of the Indo-Pacific region, ranging from the eastern coast of Africa to the central and western Pacific Ocean, including the Hawaiian Islands.
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