How to Identify Spangled Perch

To identify Spangled Perch (Leiopotherapon unicolor), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Variable, typically silvery-grey to brownish-green on the back, fading to a lighter belly. The most distinctive feature is the presence of numerous small, dark spots (spangles) on the body and fins, which can be iridescent or golden in certain light. Fins are often dusky or yellowish.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Numerous small, dark spots (spangles) covering the body and fins., Deeply forked caudal fin., Robust, moderately compressed body., Relatively small mouth., Strong, spiny dorsal fin.

Dorsal fin

Single, long dorsal fin with 11-13 strong spines followed by 9-12 soft rays. The spiny and soft-rayed portions are continuous but deeply notched.

Tail fin

Deeply forked caudal fin, often with dusky margins.

Pectoral fin

Moderately sized, rounded pectoral fins.

Distinctive fins

Pelvic fins are thoracic, located directly below the pectoral fins, with one spine and five soft rays. Anal fin has 3 spines and 7-10 soft rays.

Identification Tips

1. 1

   Spangled Pattern

   Look for the characteristic small, dark, often iridescent spots covering the body and fins, which give the fish its common name.

2. 2

   Body Shape

   Observe the robust, moderately compressed body with a relatively deep profile.

3. 3

   Dorsal Fin

   Note the single, long dorsal fin with a distinct notch separating the spiny and soft-rayed portions.

4. 4

   Caudal Fin

   Identify the deeply forked tail fin.

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