Malaysia country information

Common names: Halfbeak, Jolong sungai, Jolong-jolong
Occurrence: questionable
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Recorded from Pulau Tioman (Ref. 41184). Also Ref.4835. Outside distributional range, occurrence needs further confirmation.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/my.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Meisner, A.D., 2001
National Database:

Common names from other countries

Malayan, Freshwater halfbeak, Needle gar, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Beloniformes (Needle fishes) > Zenarchopteridae (Internally fertilized halfbeaks)
Etymology: Dermogenys: Greek, derma = skin + Greek, geny, -yos = face, jaw (Ref. 45335).
More on authors: Kuhl, van & Hasselt.

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

Marine; freshwater; brackish; pelagic-neritic; pH range: 7.0 - 8.0; dH range: 9 - 19; depth range 0 - ? m. Tropical; 24°C - 28°C (Ref. 30491)

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

Asia: Java, Indonesia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 16.1 cm TL male/unsexed; (Ref. 111275)

Found in rivers, rivulets, canals, drains, ponds and lakes (Ref. 4833). Rarely found in the sea (Ref. 45255). Inhabits medium to large rivers, flooded fields and mainly stagnant waters including sluggish flowing canals of the lower Mekong (Ref. 12975). Most common in areas with floating plants or rooted aquatics that reach the surface (Ref. 12693). Larvae and early juveniles are sometimes found in the upper reaches of mangroves during the wet season (Ref. 43081). A live-bearer species. Feed on worms, crustaceans and insects (Ref. 7020). Rarely taken in commercial catches, although it may be found in subsistence catches. Not seen in markets (Ref. 12693).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Gives birth to 10-30 young.

Main reference Upload your references | References | Coordinator | Collaborators

Kottelat, M., 2013. The fishes of the inland waters of Southeast Asia: a catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries. The Raffles Bulletin of Zoology 2013 (Suppl. 27):1-663. (Ref. 94476)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 02 September 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial; aquarium: commercial

FAO(Publication : search) | FishSource |

More information

Trophic ecology
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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00398 (0.00224 - 0.00706), b=2.89 (2.74 - 3.04), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 3.4 ±0.45 se; based on food items.

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Price category (Ref. 80766): Unknown.

Dermogenys pusilla Kuhl, van & Hasselt, 1823