Betta macrostoma — Details

Brunei Beauty learn more about names for this taxon

Overview

Comprehensive Description

Biology

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Inhabits shallow (about 30 cm deep) near stagnant pools along stream bed with substrate consisting of clay (Ref. 56613). Occurs also in waterfalls with fast flowing clear water; occupies small pools in tributaries and quiet pools along the main confluence of the river (Ref. 56613). A mouth brooder (Ref. 56613).
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Distribution

Range Description

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For further documentation see International Betta Congress
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Asia: Borneo.
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Physical Description

Morphology

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Dorsal spines (total): 0 - 1; Dorsal soft rays (total): 9 - 11; Anal spines: 0 - 1; Analsoft rays: 24 - 27; Vertebrae: 31 - 32
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Size

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Maximum size: 110 mm TL
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Max. size

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6.7 cm SL (male/unsexed; (Ref. 56613))
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Diagnostic Description

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Differs from other member of the Betta unimaculata group by possessing the following combination of characters: dorsal fin ocellus; body red in color; caudal fin with transverse black and red bands; opercle with large red blotch in mature male; vertebrae 31-32 (mode 32); dorsal-fin rays 9-11 (mode 10); anal-fin rays 25-28 (mode 27); pectoral-fin rays 13-14; lateral scales 32-33 (mode 33); subdorsal scales 6-8 (mode 7); predorsal scales 21-24 (mode 23); predorsal length 62.3-66.7% SL; head length 30.4-33.3% SL; anal-fin base length 43.2-49.2% SL; dorsal-fin base length 12.2-15.7% SL; lower jaw length 38.0-54.0% HL (Ref. 56613).
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Ecology

Habitat

Habitat and Ecology

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Systems
  • Freshwater
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Environment

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benthopelagic; freshwater; pH range: 4.4 - 5.7; dH range: 10
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Life History and Behavior

Life Cycle

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Male is carrying the eggs in the mouth.
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
VU
Vulnerable

Red List Criteria
D2

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Kottelat, M.

Reviewer/s
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Threats

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Vulnerable (VU) (D2)
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Relevance to Humans and Ecosystems

Benefits

Importance

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aquarium: commercial
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Wikipedia

Betta macrostoma

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Betta macrostoma is a species of fish in the Osphronemidae[1][2] family. It is endemic to Brunei and some parts of Borneo.

References

  1. ^ gbif.org
  2. ^ fishbase.org
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