Trichogaster lalius 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Perciformes Osphronemidae

Scientific Name: Trichogaster lalius
Species Authority: (Hamilton, 1822)
Polyacanthus lalius
Taxonomic Notes: Hamilton (1822) described Trichopodus lalius from Gangetic provinces. Menon (1999) treated it under the genus Polyacanthus. Now the species is under Trichogaster (Topfer and Schindler 2009; Tan and Kottelat 2009).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2010-01-21
Assessor(s): Vishwanath, W.
Reviewer(s): Jha, B.R., Allen, D.J., Datta, N.C., Britz, R. & Dey, S.C.
Contributor(s): Molur, S.
Although there are no data on population, the inferred extent of occurrence of the species is very wide and there are no significant threats across its range. Thus Trichogaster lalius is assessed as Least Concern.

Geographic Range [top]

Range Description:Trichogaster lalius is widely distributed in India (lowland Ganges and Brahmaputra basins), Pakistan (rare), Bangladesh, and Nepal.
Countries occurrence:
Bangladesh; India (Arunachal Pradesh, Assam, Bihar, Manipur, Uttaranchal, Uttar Pradesh, West Bengal); Nepal; Pakistan
Continuing decline in extent of occurrence (EOO):Unknown
Extreme fluctuations in extent of occurrence (EOO):Unknown
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No detailed information available. It is reported as present in large quantities in the breeding season in Assam.
Current Population Trend:Unknown
Additional data:
Continuing decline of mature individuals:Unknown
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Most of the species are known from slow moving streams, rivulets and lakes with plenty of vegetation. Also from rice fields, irrigation channels and other agricultural lands.
Continuing decline in area, extent and/or quality of habitat:No

Use and Trade [top]

Use and Trade: These lovely little fishes are often sold alive in bottles of water at Calcutta and they thrive well in an aquarium. It attains 5 cm. in length. It is smallest of the genus and certainly one of the most beautiful. A highly satisfactory and interesting aquarium fish.  The species is used for food at the subsistence level.

Threats [top]

Major Threat(s): The species may suffer from overexploitation for the aquarium trade.

Conservation Actions [top]

Conservation Actions:

Potential threats to this species and impacts of aquarium trade on the populations need to be identified.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable  major importance:Yes
15. Artificial/Aquatic & Marine -> 15.2. Artificial/Aquatic - Ponds (below 8ha)
suitability: Suitable  major importance:No
15. Artificial/Aquatic & Marine -> 15.3. Artificial/Aquatic - Aquaculture Ponds
suitability: Suitable  major importance:No
15. Artificial/Aquatic & Marine -> 15.7. Artificial/Aquatic - Irrigated Land (includes irrigation channels)
suitability: Suitable  major importance:Yes
15. Artificial/Aquatic & Marine -> 15.8. Artificial/Aquatic - Seasonally Flooded Agricultural Land
suitability: Suitable  major importance:No
15. Artificial/Aquatic & Marine -> 15.9. Artificial/Aquatic - Canals and Drainage Channels, Ditches
suitability: Suitable  major importance:No
1. Land/water protection -> 1.1. Site/area protection
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
  Action Recovery plan:No
  Systematic monitoring scheme:No
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over part of range
  Occur in at least one PA:Unknown
  Area based regional management plan:No
  Invasive species control or prevention:Not Applicable
In-Place Species Management
  Harvest management plan:No
  Successfully reintroduced or introduced beningly:No
  Subject to ex-situ conservation:No
In-Place Education
  Subject to recent education and awareness programmes:No
  Included in international legislation:No
  Subject to any international management/trade controls:No
5. Biological resource use -> 5.4. Fishing & harvesting aquatic resources -> 5.4.2. Intentional use: (large scale)
♦ timing: Ongoing ♦ scope: Unknown ♦ severity: Unknown ⇒ Impact score: Unknown 

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats

♦  Food - human
 Local : ✓ 

♦  Pets/display animals, horticulture
 National : ✓  International : ✓ 

Bibliography [top]

Hamilton, F. 1822. An account of the fishes found in the river Ganges and its branches. Edinburgh & London.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.4). Available at: (Accessed: 27 October 2010).

Menon, A.G.K. 1999. Check list - fresh water fishes of India..

Topfer, J.andSchindler, I. 2009. On the type species of Trichopodus (Teleostei: Perciformes: Osphronemidae. Vertebrate Zoology 59(1): 49-51.

Citation: Vishwanath, W. 2010. Trichogaster lalius. In: The IUCN Red List of Threatened Species 2010: e.T166445A6210533. . Downloaded on 25 November 2015.
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