How to Identify Japanese Whiting

To identify Japanese Whiting (Sillago japonica), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically light brown to greenish-brown, fading to silvery-white on the flanks and belly. A faint, silvery lateral stripe may be present. Fins are generally translucent or pale.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Elongated, slender body, Small, terminal mouth, Two distinct dorsal fins, Large, ctenoid scales, Absence of a swim bladder in adults (a key characteristic of the family Sillaginidae)

Dorsal fin

Two dorsal fins; the first with 10-11 spines, the second with 1 spine and 11-13 soft rays. The first dorsal fin is typically higher than the second.

Tail fin

Caudal fin is slightly forked or emarginate.

Pectoral fin

Pectoral fins are relatively long and pointed, with 15-17 rays.

Distinctive fins

Anal fin has 2 spines and 12-14 soft rays. Pelvic fins are thoracic, with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Body Shape

   Look for a very slender, elongated body, characteristic of whiting species.

2. 2

   Dorsal Fins

   Note the two distinct dorsal fins, with the first being spiny and generally taller than the second soft-rayed fin.

3. 3

   Coloration

   Observe the silvery-white belly and flanks, transitioning to a light brown or greenish-brown back.

4. 4

   Mouth

   The mouth is small and terminal, adapted for picking small prey from the substrate.

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