How to Identify Greater argentine

To identify Greater argentine (Argentina silus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically brownish-grey to olive-green, fading to bright silvery on the flanks and belly. The operculum (gill cover) often has a golden or iridescent sheen.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Large eyes, positioned laterally, adapted for low light conditions., A small adipose fin located between the dorsal and caudal fins., A relatively small mouth with fine teeth., A distinct, strong odor, often described as cucumber-like, when freshly caught.

Dorsal fin

Single dorsal fin, relatively short, located mid-body. Typically 10-12 soft rays.

Tail fin

Deeply forked caudal fin.

Pectoral fin

Pectoral fins are relatively small and low-set.

Distinctive fins

Presence of a small, fleshy adipose fin posterior to the dorsal fin, a characteristic of the order Argentiniformes.

Identification Tips

1. 1

   Adipose Fin

   Look for the small, fleshy adipose fin between the dorsal and caudal fins, a key family characteristic.

2. 2

   Eye Size

   The eyes are notably large relative to the head size, an adaptation to its deep-water habitat.

3. 3

   Coloration

   The distinct silvery flanks and belly, contrasting with a darker back, are characteristic.

4. 4

   Body Shape

   Its slender, elongated body helps distinguish it from more robust bottom-dwelling species.

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