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💧 Freshwater Least Concern 🌡️ Subtropical

Koshi Nangra

Nangra assamensis Sen & Biswas, 1994
Max Length
10.5 cm
Max Weight
Lifespan
Trophic Level
3.2
Depth
Climate
Subtropical
Resilience
Medium
Vulnerability
32.00/100
Typical Length
Depth Zone
demersal

📖 Overview

Koshi Nangra (Nangra assamensis) is a ray-finned fish. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 10.5 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Nangra assamensis
Authority
Sen & Biswas, 1994
Habitat
Freshwater
Climate
Subtropical
Body Shape
Elongated
IUCN Status
LC
Max Length
10.5 cm
Trophic Level
3.2
Resilience
Medium
Vulnerability
32.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Nangra
Nangra
Species
Koshi Nangra
Nangra assamensis

🐟 Physical Description

Dorsal spines (total): 1; Dorsal soft rays (total): 6; Vertebrae: 35 - 37. Dorsal fin with 6 branched rays; dorsal and pectoral-fin spines with filamentous extensions. Anal fin with 4-5 simple rays, 7-9 branched rays. Snout strongly projecting. Nasal barbel reaching only to posterior margin of orbit; maxillary barbel reaching to end of pelvic fin or to anal-fin origin; maxillary barbel membrane with narrow attachment to cheek and broad attachment to corner of mouth; mental barbels reaching posteriorly to end of head. Vent opens into pouch or pseudovent, with broad membranous opening near pelvic fin tip. Head, body and caudal peduncle slightly more elongate than other congeners .: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Koshi Nangra is currently being reviewed.

🦐 Diet

Diet information for Koshi Nangra is currently being compiled.

🥚 Reproduction

Reproduction data for Koshi Nangra is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal. Subtropical

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00676 × L3.06 (TL)
Max TL
10.5cm
Dorsal Spines
1
Dorsal Rays
6
Vertebrae
36

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
32.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Sen & Biswas, 1994

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