How to Identify Spotted Javelin

To identify Spotted Javelin (Pomadasys maculatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-grey to brownish-grey dorsally, fading to white or yellowish-white ventrally. Characterized by numerous dark, irregularly shaped spots or blotches scattered over the head, body, and fins. These spots are typically larger and more prominent on the upper flanks and dorsal region. Juveniles often have more distinct banding or larger blotches.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Robust, moderately compressed body., Small mouth with thick lips., Presence of numerous dark spots/blotches on body and fins., Strong, serrated preopercle., A pair of pores and a median groove on the chin., Produces 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 spinous portion is longer than the soft-rayed portion.

Tail fin

Caudal fin emarginate to slightly forked, with rounded lobes.

Pectoral fin

Pectoral fins are moderately long, reaching beyond the origin of the anal fin.

Distinctive fins

Anal fin with 3 strong spines and 7-8 soft rays. Pelvic fins thoracic, with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for a moderately compressed, silvery-grey body covered with distinct, irregularly shaped dark spots or blotches on the head, body, and fins. The spots are a key identifier.

2. 2

   Dorsal Fin

   Note the single, deeply notched dorsal fin with a prominent spinous portion (12-13 spines) and a shorter soft-rayed portion (13-15 rays).

3. 3

   Chin Pores

   Observe the two distinct pores and a median groove on the chin, characteristic of the Haemulidae family.

4. 4

   Sound Production

   If handled, this fish may produce a 'grunting' sound, a common trait among grunts (Haemulidae).

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