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 & vanHasselt.
Environment: milieu / climate zone / depth range / distribution range
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)
Asia: Java, Indonesia.
Size / Weight / Age
Maturity: Lm ?  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
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Gives birth to 10-30 young.
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. 126983)
Threat to humans
Fisheries: minor commercial; aquarium: commercial
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 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).
Nutrients (Ref. 124155
): Calcium = 579 [268, 1,223] mg/100g; Iron = 1.84 [0.66, 5.36] mg/100g; Protein = 17.2 [15.2, 19.1] %; Omega3 = 0.215 [0.088, 0.634] g/100g; Selenium = 21 [9, 49] μg/100g; VitaminA = 27.9 [6.7, 130.1] μg/100g; Zinc = 2.85 [1.76, 4.43] mg/100g (wet weight); based on nutrient studies.