How to Identify Copper Mahseer

To identify Copper Mahseer (Neolissochilus hexagonolepis), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Variable, typically golden to coppery-brown on the dorsal surface, fading to silvery-white on the belly. Fins are often dusky or reddish. Juveniles may have faint vertical bars. Coloration can intensify during breeding season.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Large, hexagonal scales, particularly prominent on the flanks., Two pairs of barbels (rostral and maxillary), with the maxillary pair being longer and reaching beyond the anterior margin of the eye., A prominent, fleshy snout., Strong, muscular body adapted for fast-flowing water.

Dorsal fin

Short-based, with 4 unbranched and 8-9 branched rays. The last unbranched ray is strong and ossified, often serrated posteriorly in adults.

Tail fin

Deeply forked, with pointed lobes.

Pectoral fin

Well-developed, positioned low on the body.

Distinctive fins

All fins are robust and adapted for powerful swimming in turbulent waters.

Identification Tips

1. 1

   Scales

   Look for the characteristic large, hexagonal scales, especially noticeable along the lateral line and flanks. This is a key distinguishing feature from other mahseer species.

2. 2

   Barbels

   Observe the two pairs of barbels. The maxillary barbels are notably long, extending past the front of the eye.

3. 3

   Dorsal Fin Ray

   Examine the last unbranched dorsal fin ray; it is typically strong, ossified, and often serrated posteriorly in mature individuals.

4. 4

   Body Coloration

   Note the coppery-golden to brownish coloration on the back and sides, contrasting with a lighter belly. This can vary with habitat and age.

5. 5

   Habitat

   Its presence in clear, fast-flowing, rocky mountain streams and rivers is a strong indicator.

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