Trigonostigma heteromorpha  (Duncker, 1904)

Harlequin rasbora
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Trigonostigma heteromorpha
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Danioninae
Etymology: Trigonostigma: Greek, tres, tria = three + Greek, gonias= angle, corner + Greek stigma = signal.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; pH range: 5.0 - 7.0; dH range: 5 - 12.   Tropical; 22°C - 25°C (Ref. 1672)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: Thailand (Narathiwat southwards) to Sumatra, Indonesia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 5.0 cm TL male/unsexed; (Ref. 13061)

Short description Morphology | Morphometrics

Color pattern reddish, pinkish or orange body with a conspicuous black stripe from below dorsal-fin origin to middle of caudal-fin base and usually broadened anteriorly so as to have a triangular or hatched shape. Incomplete lateral line reduced to 6-9 pores. No barbels. Branched anal rays, 5 (Ref. 38434).

Biology     Glossary (e.g. epibenthic)

Inhabits forest streams (Ref. 13061). Found in primary peat swamps in larger than 100 fish (Ref. 57235). Feeds on worms, crustaceans and insects (Ref. 7020). Eggs spawned at the underside of broad leaves and similar structures (Ref. 38434). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51539). Previously known as "Rasbora" but revised as separated genus by Kottelat & Witte (1999) (Ref. 57235).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Kottelat, M. and K.E. Witte, 1999. Two new species of Microrasbora from Thailand and Myanmar, with two new generic names for small Southeast Asian cyprinid fishes (Teleostei: Cyprinidae). J. South Asian Nat. Hist. 4(1):49-56. (Ref. 38434)

IUCN Red List Status (Ref. 115185)

  Least Concern (LC) 

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Aquarium: highly commercial
FAO(Publication : search) | FishSource |

More information

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Ecology
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Common names
Synonyms
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Predators
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Fecundity
Eggs
Egg development
Age/Size
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Length-weight
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Morphometrics
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Special reports

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Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.40 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .