How to Identify Lambari

To identify Lambari (Astyanax lacustris), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery body, often with a yellowish or greenish tint dorsally. A distinct, vertically elongated black humeral spot (behind the operculum) is usually present. A second, less defined, black spot may be present on the caudal peduncle. Fins are typically hyaline (clear) to yellowish, sometimes with reddish tints, especially in breeding males.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Laterally compressed body, Presence of an adipose fin, Two distinct rows of teeth in the premaxilla, Typically 34-38 lateral line scales, A prominent, vertically elongated black humeral spot

Dorsal fin

Typically 10-11 rays (ii-iii unbranched, 8-9 branched)

Tail fin

Forked, with 19 principal rays

Pectoral fin

Typically 11-13 rays

Distinctive fins

Presence of a small, fleshy adipose fin between the dorsal and caudal fins.

Identification Tips

1. 1

   Humeral Spot

   Look for a distinct, vertically elongated black spot located just behind the gill cover. This is a key diagnostic feature.

2. 2

   Body Shape and Coloration

   Its silvery, laterally compressed body is typical. The presence of a caudal peduncle spot, though sometimes faint, can also aid identification.

3. 3

   Fin Count

   Counting the rays in the dorsal fin (typically 10-11) and the lateral line scales (34-38) can help differentiate it from similar species.

4. 4

   Adipose Fin

   The presence of a small, fleshy adipose fin is characteristic of characins, including Astyanax lacustris.

Explore Lambari