Question

Neolissochilus hexagonolepis is commonly known as

• A. Snow trout
• B. Copper mahseer
• C. Deccan mahseer
• D. Himalayan mahseer

Hint:

Mahseer species are often confused. Remember:
1. Golden Mahseer = Tor putitora
2. Copper/Chocolate Mahseer = Neolissochilus hexagonolepis
3. Deep-bodied/Deccan Mahseer = Tor khudree
Hexagonal scales are the key taxonomic marker for Neolissochilus.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks for the common name of the fish species Neolissochilus hexagonolepis.
Taxonomically, this species belongs to the family Cyprinidae and the subfamily Cyprininae. It is a highly valued game and food fish found primarily in the Himalayan region and Southeast Asia.
Detailed Explanation:

• Identity and Nomenclature: Neolissochilus hexagonolepis is popularly known as the "Copper mahseer" or sometimes "Chocolate mahseer" due to its distinctive bronze or coppery-brown coloration on the dorsal and lateral sides.

• Morphological Features: This fish is characterized by large, hexagonal scales (hence the specific epithet hexagonolepis). It has a deep body, a terminal mouth, and two pairs of barbels (rostral and maxillary).

• Habitat and Distribution: It is predominantly found in fast-flowing hill streams and rivers of the Himalayas, including countries like India, Nepal, Bhutan, and Myanmar. It prefers clear, cold waters with rocky or gravelly substrates.

• Economic and Ecological Importance: Beyond its role as a protein source for local communities, it is a prized sport fish for anglers. Due to habitat degradation and overfishing, it is listed as Near Threatened (NT) by the IUCN.

• Comparison with Options:
• Snow trout refers to the genus Schizothorax.

• Deccan mahseer refers to Tor khudree.

• Himalayan mahseer generally refers to Tor putitora (Golden mahseer).

Step 2: Final Answer:
Therefore, the common name for Neolissochilus hexagonolepis is the Copper mahseer.