How to Identify Pinktail Triggerfish

To identify Pinktail Triggerfish (Melichthys vidua), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is predominantly dark brown to black, often with a purplish or bluish sheen, especially under certain lighting. The most striking feature is its caudal fin (tail), which is a vibrant pink to reddish-orange. The dorsal and anal fins are typically dark with a thin, light blue or white margin. The eyes are often ringed with a lighter color.

Scale type

ganoid

Mouth position

terminal

Distinctive features

Vibrant pink to reddish-orange caudal fin., Dark body coloration with a purplish or bluish sheen., Small, terminal mouth with strong, incisor-like teeth., First dorsal spine can be locked erect, giving the 'trigger' mechanism.

Dorsal fin

Two dorsal fins; the first consists of three strong spines, with the first spine being the longest and capable of being locked erect. The second dorsal fin is soft-rayed and elongated.

Tail fin

Lunate to slightly emarginate, vibrant pink to reddish-orange.

Pectoral fin

Small and rounded, typically dark.

Distinctive fins

The pelvic fins are fused into a single, spiny flap-like structure on the belly, characteristic of triggerfish.

Identification Tips

1. 1

   Caudal Fin Color

   The most definitive feature is the bright pink to reddish-orange tail, which contrasts sharply with its dark body.

2. 2

   Body Color

   Its dark, almost black body with a subtle purplish or bluish iridescence is characteristic.

3. 3

   Fin Margins

   Look for the thin, light blue or white margins on the soft dorsal and anal fins.

4. 4

   Body Shape

   Like other triggerfish, it has a compressed, oval-shaped body.

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