How to Identify Silver Robber

To identify Silver Robber (Brycinus lateralis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Overall silvery body, often with a greenish or bluish sheen on the dorsal surface. A prominent, dark, horizontal lateral stripe extends from behind the operculum to the caudal peduncle. Fins are typically hyaline (clear) to yellowish, sometimes with reddish tints, especially in the caudal fin.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Prominent dark lateral stripe, Adipose fin present, Forked caudal fin, Relatively large scales

Dorsal fin

Single dorsal fin, typically with 2 unbranched and 8-9 branched rays. Originates slightly anterior to the anal fin origin.

Tail fin

Deeply forked caudal fin, symmetrical lobes.

Pectoral fin

Pectoral fins are relatively long and pointed, with 1 unbranched and 11-13 branched rays.

Distinctive fins

Adipose fin is present, small, and located posterior to the dorsal fin. Anal fin has 3 unbranched and 14-17 branched rays. Pelvic fins are abdominal, with 1 unbranched and 7 branched rays.

Identification Tips

1. 1

   Lateral Stripe

   The most distinguishing feature is the prominent, dark, horizontal stripe running along the flank from the gill cover to the caudal peduncle. This stripe is usually well-defined and contrasts with the silvery body.

2. 2

   Body Shape

   Its elongated, fusiform body shape is typical of active, schooling characins. It is laterally compressed but robust.

3. 3

   Adipose Fin

   The presence of a small adipose fin between the dorsal and caudal fins confirms its classification within the Characiformes order, specifically the Alestidae family.

4. 4

   Fin Coloration

   While the body is silvery, the fins can sometimes exhibit yellowish or reddish tints, particularly the caudal fin, which can aid in identification.

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