How to Identify Jarbua Terapon

To identify Jarbua Terapon (Terapon jarbua), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-grey to brownish-grey body with three to four prominent, curved, dark brown to black longitudinal stripes. The stripes are typically broadest anteriorly and narrow towards the caudal fin. A distinct black blotch is often present on the operculum (gill cover). Fins are generally translucent to dusky, with the caudal fin often having dark tips on the lobes.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Three to four prominent, curved, dark longitudinal stripes on the body., A large black blotch on the operculum., Strongly serrated preoperculum and operculum, with two strong spines on the operculum, the lower one longer and stronger., Deeply notched dorsal fin with a strong spine at the beginning of the soft-rayed portion., Caudal fin with dark tips on the lobes.

Dorsal fin

Single, deeply notched dorsal fin with 11-12 strong spines and 9-11 soft rays. The spinous portion is longer than the soft-rayed portion.

Tail fin

Forked caudal fin with pointed lobes, often with dark tips.

Pectoral fin

Moderately sized, rounded pectoral fins.

Distinctive fins

Anal fin with 3 strong spines and 7-10 soft rays. Pelvic fins are thoracic with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Body Stripes

   Look for the characteristic three to four curved, dark longitudinal stripes on the body. These are a primary identifier.

2. 2

   Opercular Spot

   Note the prominent black blotch on the operculum (gill cover).

3. 3

   Dorsal Fin

   Observe the deeply notched dorsal fin with its strong spines, particularly the one at the start of the soft-rayed portion.

4. 4

   Opercular Spines

   Carefully examine the operculum for two strong spines, with the lower one being longer and more robust. This requires close inspection and caution due to their sharpness.

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