How to Identify Spotted grunt

To identify Spotted grunt (Pomadasys macracanthus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-grey body, often with a darker dorsal surface and lighter belly. Distinctive dark spots are scattered over the upper flanks, dorsal fin, and caudal fin. Some individuals may exhibit faint vertical bars.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Large, prominent dark spots on the body and fins., Relatively large eyes., Thick lips., Strong, spiny dorsal fin.

Dorsal fin

Single dorsal fin, deeply notched, with 12-13 strong spines followed by 13-15 soft rays. The spines are notably robust.

Tail fin

Caudal fin is moderately forked.

Pectoral fin

Pectoral fins are relatively long and pointed.

Distinctive fins

Anal fin with 3 strong spines and 7-8 soft rays. The second anal spine is typically very long and robust, a key diagnostic feature.

Identification Tips

1. 1

   Spotting Pattern

   Look for prominent, irregularly shaped dark spots on the upper half of the body, extending onto the dorsal and caudal fins. The intensity and distribution of spots can vary but are always present.

2. 2

   Second Anal Spine

   Examine the anal fin; the second spine is notably thick and long, often longer than the third spine, which is a crucial distinguishing characteristic for this species within the genus Pomadasys.

3. 3

   Body Shape and Color

   Observe the compressed, silvery-grey body. While other grunts may be silvery, the distinct spotting pattern combined with the robust anal spine helps confirm identification.

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