How to Identify Humbug Dascyllus

To identify Humbug Dascyllus (Dascyllus melanurus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Distinctive pattern of four broad, vertical black bands alternating with three white bands on a white to silvery-white body. The caudal fin (tail) is entirely black, which is a key distinguishing feature.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Four prominent vertical black bands on a white body., Entirely black caudal fin., Small, oval-shaped body., Large eyes relative to body size.

Dorsal fin

Single dorsal fin with 12 spines and 12-13 soft rays.

Tail fin

Caudal fin is emarginate (slightly forked) and entirely black.

Pectoral fin

Pectoral fins are clear to slightly dusky.

Distinctive fins

Anal fin has 2 spines and 12-13 soft rays. Pelvic fins are black.

Identification Tips

1. 1

   Coloration and Banding

   Look for the characteristic four black vertical bands on a white body. This is the most immediate identifier.

2. 2

   Caudal Fin Color

   The entirely black caudal fin is a crucial distinguishing feature from other Dascyllus species.

3. 3

   Habitat Association

   Observe its behavior around branching corals; Humbug Dascyllus are almost always found sheltering within these structures.

4. 4

   Size

   Adults typically reach a maximum standard length of about 6-7 cm (2.4-2.8 inches).

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