Aquarist Atlas
Ricefish · East Asian medaka · Oryzias

Oryzias chenglongensis

Chen & Lai, 2024

2 cited sourcesName checked against Eschmeyer’s Catalog of Fishes, update of

IUCNNOT EVALUATED
NEnot on the EX–LC scale
CARESNOT LISTED
Type localityChenglong wetland, Yulin County, Taiwan, ROCper Catalog of Fishes
Scientific size1 in2.5 cm standard length
Depth—not recorded
DietNot documented for this species; ricefishes in general take small invertebrates and algae at or near the surface
BreedingNot documented for this species
Sexual dimorphismNot documentedNot documented for this species
PhotographsSee photosGoogle Images →

Oryzias chenglongensis is a medaka described in 2024 by Chen and Lai from the Chenglong wetland in Yunlin County, western Taiwan. FishBase gives a maximum of 1 in SL. It is brackish-water in the wild but survives well in fresh water.

Taxonomy & naming

Chen and Lai described the species in 2024 from the Chenglong wetland in Yulin (Yunlin) County, Taiwan. It is one of several recently described Taiwanese medaka.

Morphology

A small medaka; FishBase gives a maximum of 1 in SL.

Habitat

A coastal wetland in western Taiwan; the name refers to the type locality. FishBase says it was collected from brackish habitat at a salinity of roughly 20 to 30, and that the other recorded localities are also brackish wetlands and estuaries. In breeding experiments it survived well in fresh water, so it may live more widely in lowland fresh to brackish water around Taiwan.

Feeding

Diet is not documented.

Mating

Courtship has not been described.

Breeding

Breeding has not been documented.

In the aquarium

Not known in the aquarium trade.

Conservation

No IUCN assessment is recorded for this recently described species. Coastal wetlands in western Taiwan are under development pressure.

Common questions

Oryzias chenglongensis: how big does it get?
Up to 1 in standard length (SL).
Oryzias chenglongensis: where does it come from?
It is recorded from Taiwan.

On a list: Nano fish

Related species compared · Oryzias

SpeciesAdult sizeTemperaturepHHardnessIUCN
Oryzias chenglongensisthis species1 in SL———NE
Oryzias moramoensis1 in SL———NE
Oryzias asinua1 in SL———EN
Daisy's ricefishOryzias woworae1 in SL—pH 6–7—EN
Oryzias pectoralis1 in SL———DD
Soeroto's ricefishOryzias soerotoi1 in SL———CR
Oryzias wolasi1 in SL75–79 °F——DD
Oryzias haugiangensis1 in SL———DD
Oryzias hubbsi1 in SL———NT
Indian ricefishOryzias carnaticus1 in SL———LC
Mekong medakaOryzias mekongensis1 in TL———LC
Indian medakaOryzias dancena1 in SL———LC

Recorded ranges from each species’ own page; hardness is the tolerance its sources give, not a measurement of the water it lives in. See all 40 Oryzias species →

Sources

  1. FishBase — Oryzias chenglongensis Chen & Lai, 2024
  2. Eschmeyer's Catalog of Fishes (California Academy of Sciences) — Oryzias chenglongensis

Naming authority: Oryzias chenglongensis in Eschmeyer’s Catalog of Fishes ↗

Last reviewed 2026-10-05.

How to cite

Aquarist Atlas (2026). Oryzias chenglongensis. Aquarist Atlas.https://www.aquaristatlas.com/ricefish/oryzias-chenglongensis/

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