How to Identify Western hardyhead

To identify Western hardyhead (Atherinomorus vaigiensis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Silvery body with a distinct, broad, dark-silver to black lateral stripe running from the operculum to the caudal fin base. The dorsal surface is typically greenish-grey to olive, fading to white on the ventral side. Fins are generally translucent.

Scale type

cycloid

Mouth position

superior

Distinctive features

Two widely separated dorsal fins, Large eyes, Small, upward-pointing mouth, Prominent silvery lateral stripe

Dorsal fin

Two dorsal fins; the first dorsal fin has 5-8 flexible spines, and the second dorsal fin has 1 spine and 8-10 soft rays.

Tail fin

Forked caudal fin.

Pectoral fin

Pectoral fins are relatively short, located high on the body.

Distinctive fins

Pelvic fins are small and abdominal, located well behind the pectoral fin base.

Identification Tips

1. 1

   Lateral Stripe

   Look for the broad, dark-silver to black lateral stripe that is a key distinguishing feature of this species.

2. 2

   Dorsal Fins

   Note the two distinctly separated dorsal fins, with the first being spiny and the second soft-rayed.

3. 3

   Mouth Position

   Observe the small, upward-pointing mouth, indicative of its surface-feeding habits.

4. 4

   Body Shape

   Its slender, elongated body is typical of hardyheads.

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