Actinopteri (ray-finned fishes) > Beloniformes
(Needle fishes) > Zenarchopteridae
(Internally fertilized halfbeaks)
Etymology: Hemirhamphodon: Greek, hemi = half + Greek, rhamphos = bill + greek, odous = teeth (Ref. 45335). More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; pelagic; pH range: 6.0 - 8.0; dH range: 5 - 12; depth range 0 - ? m. Tropical; 24°C - 28°C (Ref. 30491)
Asia: southern Thailand, Malaysia, Singapore and Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 10.0 cm SL male/unsexed; (Ref. 57235); 6.0 cm TL (female)
Belongs to the pogonognathus group with dorsal fin melanophores of one size instead of two and a distinct gap present between the pigment in the distal part of the fin between fin rays 3-8 and the dorsal fin base that is greater than the distance between two adjacent fin rays (Ref. 26761).
Found in peats and lowland forest streams (Ref. 57235). In fresh and brackish water. Females bear live young (Ref. 58777). Uncommon aquarium species (Ref. 57235).
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. 123251)
CITES (Ref. 123416)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00183 - 0.00997), b=3.02 (2.81 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.2 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (tm<1).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .