How to Identify Spotted Grunter

To identify Spotted Grunter (Pomadasys commersonnii), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-grey to bronze body, often with a yellowish tinge on the belly. Characterized by numerous distinct, dark brown to black spots scattered irregularly over the head, body, and fins. The spots are generally larger and more prominent on the upper flanks.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Pronounced spots covering the body and fins., Thick, fleshy lips., Small, conical teeth., A deep, compressed body., The ability to produce a 'grunting' sound by grinding pharyngeal teeth.

Dorsal fin

Single dorsal fin, deeply notched, with 12-13 strong spines and 13-15 soft rays. The spiny portion is longer than the soft-rayed portion.

Tail fin

Moderately forked caudal fin.

Pectoral fin

Long and pointed pectoral fins.

Distinctive fins

Anal fin with 3 strong spines and 7-9 soft rays. Pelvic fins are thoracic.

Identification Tips

1. 1

   Spots

   The most defining characteristic is the presence of numerous dark spots over the body and fins. The size and density of these spots can vary but are always present.

2. 2

   Body Shape

   A deep, compressed body with a relatively small head and thick lips.

3. 3

   Sound Production

   When caught or distressed, they produce a distinct 'grunting' sound, which is a key identifier for the Haemulidae family.

4. 4

   Fin Spines

   Possesses strong, sharp spines in the dorsal and anal fins, typical of the grunt family.

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