Betta smaragdina 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Perciformes Osphronemidae

Scientific Name: Betta smaragdina Ladiges, 1972
Common Name(s):
English Mekong Fighting fish, Blue betta, Emerald green betta, Smaragd Fighting Fish
Taxonomic Notes: Introductions of domesticated Betta are also known to be having an adverse effect on the purity of some populations.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2012
Date Assessed: 2011-01-19
Assessor(s): Vidthayanon, C.
Reviewer(s): Allen, D.J. & Smith, K.
The species is threatened by habitat degradation; habitats across most of its range have been converted into intensive farmland, developed, or polluted, especially in Thailand and Lao PDR which are its centre of population. Genetic erosion is a secondary threat from escaped farmed stock of Betta splendens into wild habitats.

Its exact Extent of Occurrence and Area of Occupancy and declining rate are poorly known currently, but is locally uncommon it its suitable habitats. Further information is needed on the species distribution and threats, and the species is assessed as Data Deficient.

Geographic Range [top]

Range Description:This species is known from the Khorat Plateau in northeastern Thailand and lowland Lao PDR and northern Cambodia in the Mekong and basin. Its natural range stretches southwards from the Thai/Lao PDR border through the provinces of Nong Khai, Udon Thani, Khon Khaen, Ubon Ratchathani and others. Possibly reported from southern Viet Nam.
Countries occurrence:
Cambodia; Lao People's Democratic Republic; Thailand
Additional data:
Lower elevation limit (metres):40
Upper elevation limit (metres):180
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Locally common to uncommon throughout its range. The species is now becoming scarce in many areas across its range due to pollution and habitat degradation.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species occurs in shallow marshland and floodplains, small seasonal swamp and waterbodies with dense vegetation, grasses and small waterplants.
Generation Length (years):2

Use and Trade [top]

Use and Trade: Popular locally in aquarium trade and in specialist international trade. Used for fighting game fish.

Threats [top]

Major Threat(s): Wetland degradation from diversion, infrastructure and agriculture may threats to this species. Hybridization from release of captive-bred specimens.

Conservation Actions [top]

Conservation Actions: Habitat management and awareness raising on captive releasing are recommended.

Citation: Vidthayanon, C. 2012. Betta smaragdina. The IUCN Red List of Threatened Species 2012: e.T180827A1666967. . Downloaded on 19 June 2018.
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