How to Identify Grass Whiting

To identify Grass Whiting (Haletta semifasciata), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Variable, typically greenish-brown to olive-green dorsally, fading to silvery-white ventrally. Often with irregular darker blotches or bars along the flanks, providing camouflage in seagrass. Fins are generally translucent or slightly yellowish.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Small, protractile mouth with small, conical teeth, Single, long dorsal fin, Elongated, slender body, Lateral line continuous, slightly curved anteriorly

Dorsal fin

Single, long dorsal fin with 9-11 spines and 10-13 soft rays. Originates above the pectoral fin base and extends almost to the caudal peduncle.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Pectoral fins are relatively small and rounded, positioned laterally.

Distinctive fins

Pelvic fins are thoracic, located below the pectoral fins, with one spine and four soft rays. Anal fin has 3 spines and 9-12 soft rays.

Identification Tips

1. 1

   Body Shape

   Elongated and slender, typical of a whiting-like fish, but with a more robust head.

2. 2

   Coloration

   Greenish-brown to olive-green back, silvery-white belly, often with irregular darker markings that help it blend into seagrass.

3. 3

   Mouth

   Small, protractile mouth with thick lips, adapted for grazing on algae and small invertebrates.

4. 4

   Dorsal Fin

   A single, long dorsal fin extending along most of the back, distinguishing it from true whitings (family Sillaginidae) which have two dorsal fins.

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