Actinopteri (ray-finned fishes) > Beloniformes
(Needle fishes) > Zenarchopteridae
(Internally fertilized halfbeaks)
Etymology: Hemirhamphodon: Greek, hemi = half + Greek, rhamphos = bill + greek, odous = teeth (Ref. 45335); tengah: Named for the central province of Kalimantan, Kalimantan Tengah from where most of the specimens were collected (Ref. 26761).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; pelagic; depth range 0 - ? m. Tropical
Asia: southern Borneo, Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.6 cm SL male/unsexed; (Ref. 7050)
Morphology | Morphometrics
Can be distinguished by the following characters: small size (maximum size 35.5 mm SL), few pectoral, usually 8; 13-15 dorsal fin rays; and anterior position of the anal fin origin, usually under dorsal-fin ray 5 or 6 (Ref. 26761).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Anderson, W.D. III and B.B. Collette, 1991. Revision of the freshwater viviparous halfbeaks of the genus Hemirhamphodon (Teleostei: Hemiramphidae). Ichthyol. Explor. Freshwat. 2(2):151-176. (Ref. 26761)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).