How to Identify Orange-lined Triggerfish

To identify Orange-lined Triggerfish (Pictiliscapus lacrymatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is predominantly dark brown to black, adorned with numerous bright orange to yellow horizontal lines that run along the flanks. A prominent, tear-drop shaped orange or yellow patch is typically present below the eye, giving rise to one of its common names. The fins often have orange or yellow margins.

Scale type

ganoid

Mouth position

terminal

Distinctive features

Bright orange to yellow horizontal lines on a dark body., Tear-drop shaped orange/yellow patch below the eye., First dorsal spine can be locked upright, giving the 'trigger' mechanism., Small, terminal mouth with strong teeth.

Dorsal fin

Two dorsal fins; the first consists of three strong spines, with the first spine being the longest and capable of locking upright. The second dorsal fin is soft-rayed and mirrors the anal fin in shape and size.

Tail fin

Slightly rounded to truncate caudal fin.

Pectoral fin

Small, rounded pectoral fins.

Distinctive fins

Anal fin is similar in shape and size to the second dorsal fin. Pelvic fins are fused into a single, spiny structure.

Identification Tips

1. 1

   Coloration and Pattern

   Look for the distinctive dark body with numerous bright orange to yellow horizontal lines. The tear-drop shaped patch below the eye is a key identifier.

2. 2

   Body Shape

   Compressed, oval-shaped body typical of triggerfish.

3. 3

   Dorsal Fin

   Observe the prominent first dorsal spine, which can be locked upright. This is characteristic of all triggerfish.

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