Actinopteri (ray-finned fishes) > Beloniformes
(Needle fishes) > Adrianichthyidae
(Ricefishes) > Oryziinae
Etymology: Oryzias: Greek, oryza = rice; because of the habitat used by this fish (Ref. 45335). More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; benthopelagic; pH range: 7.5 - 8.5; non-migratory; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 22°C - 25°C (Ref. 31267)
Asia: Indonesia, Singapore, Malaysia, Thailand (Ref. 27658). Recorded from the Mekong (Ref. 12693).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.5 cm TL male/unsexed; (Ref. 31267); common length : 3.0 cm SL male/unsexed; (Ref. 27658)
Found in ditches, canals, ponds. Occurs at the surface in habitats with dense growth of aquatic plants. Feeds on small crustaceans, insects and protozoans (Ref. 12693). Non-annual breeder. Is very difficult to maintain in aquarium (Ref. 27139). Not seen in markets (Ref. 12693).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Female carries her eggs outside her body in a cluster, attached to the genital pore by filaments.
Roberts, T.R., 1998. Systematic observations on tropical Asian medakas or ricefishes of the genus Oryzias, with descriptions of four new species. Ichthyol. Res. 45(3):213-224. (Ref. 27658)
IUCN Red List Status (Ref. 124695)
Threat to humans
Fisheries: of no interest; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00190 - 0.01207), b=3.13 (2.91 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.45 se; based on food items.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Assuming fec < 100).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .