Aquarist Atlas
Ricefish · Island Southeast Asian ricefish · Oryzias

Oryzias hubbsi

Roberts, 1998

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

IUCNNEAR THREATENED
CARESNOT LISTED
Type localityJakarta near Bandung, Java, Indonesia (laboratory stock, from wild-caught fish)per Catalog of Fishes
Scientific size1 in2.1 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 hubbsi is a ricefish from Java, described by Roberts in 1998 from laboratory stock derived from wild-caught fish near Bandung. FishBase gives a maximum of 1 in SL, and the IUCN lists it as Near Threatened.

Taxonomy & naming

Roberts described the species in 1998. The type material is unusual in coming from a laboratory stock of wild-caught fish, so the exact collecting locality in Java is unclear, and how closely wild populations match the laboratory fish has not been tested.

Morphology

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

Habitat

Java, Indonesia. The type locality is given as near Bandung, from a laboratory stock. FishBase describes a freshwater, benthopelagic fish of low hilly country at 2,297–3,281 ft elevation.

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

The IUCN Red List classes Oryzias hubbsi as Near Threatened, meaning it is close to qualifying for a threatened category.

Common questions

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

On a list: Nano fish

Related species compared · Oryzias

SpeciesAdult sizeTemperaturepHHardnessIUCN
Oryzias hubbsithis species1 in SL———NT
Javanese ricefishOryzias javanicus2 in TL72–77 °FpH 7.5–8.5—LC
Oryzias haugiangensis1 in SL———DD
Oryzias pectoralis1 in SL———DD
Dwarf medakaOryzias minutillus1 in TL72–77 °FpH 7.5–8.5—LC
Songkhram medakaOryzias songkhramensis0.5 in SL———DD
Oryzias chenglongensis1 in SL———NE
Oryzias moramoensis1 in SL———NE
Oryzias asinua1 in SL———EN
Oryzias uwai0.5 in SL———DD
Daisy's ricefishOryzias woworae1 in SL—pH 6–7—EN
Soeroto's ricefishOryzias soerotoi1 in SL———CR

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 →

Also from the Java

Sources

  1. FishBase — Oryzias hubbsi Roberts, 1998
  2. Eschmeyer's Catalog of Fishes (California Academy of Sciences) — Oryzias hubbsi
  3. Parenti, L.R. (2008) A phylogenetic analysis and taxonomic revision of ricefishes, Oryzias and relatives (Beloniformes, Adrianichthyidae). Zoological Journal of the Linnean Society 154: 494-610

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

Last reviewed 2026-10-05.

How to cite

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

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Where it has been recorded

9 georeferenced records (GBIF). Each point is a field observation or museum specimen — pan and zoom to explore where this species turns up. The coordinates come straight from GBIF and are often rounded or tied to the nearest town or river landing, so a dot can sit just beside the actual water rather than in it.

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