Black-tailed Humbug Damselfish Dascyllus melanurus

Black-tailed Humbug Damselfish
Black-tailed Humbug Damselfish
Black-tailed Humbug Damselfish
The two "Humbug" Damselfishes are named after a black and white striped sweet. The Black-tailed Humbug is also called the Four-striped Dascyllus or Damselfish after the four bold black bars (3 on the body, one on the tail). It is native to coral reefs in the western Pacific. They grow to 8cm long and are territorial and aggressive to other fish.
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White-tailed Humbug Damselfish (includes Indian Ocean Damsel) Dascyllus aruanus (incl. D. abudafur)

White-tailed Humbug Damselfish
White-tailed Humbug Damselfish
White-tailed Humbug Damselfish
The White-tailed Humbug is also called the Three-striped Dascyllus or Damselfish. They grow to 10cm long and are territorial and aggressive to other fish. It is native to coral reefs of the Indo-Pacific, but recently some authorities split the Indian Ocean populations (from the East African coast to eastern Indonesia including the Red Sea) from the western Pacific populations and called the former the Indian Ocean Humbug, Dascyllus abudafur, based on DNA evidence.