Ricefish species and medaka varieties: what differs?

Japanese ricefish (medaka), adult male, left-facing AI species illustration

Japanese ricefish (medaka)Up to 3.6 cm · 16–22 °CNatural grey-brown medaka; ornamental colours do not create new species.

Celebes ricefish, adult male with yellow-orange tail bands and lower-flank marks, left-facing AI illustration

Celebes ricefishUp to 4.5 cm · 23–27 °CYellow tail bands and lower-flank dark marks; larger than miniature ricefishes.

Indian ricefish, adult male with white fin tips and blue anal band, left-facing AI illustration

Indian ricefishUp to 3.5 cm · 23–27 °CWhite fin tips and a blue anal band; old trade names can obscure identity.

Doping-doping ricefish, natural adult male with pale yellow-silver flanks and diffuse dark spots, left-facing transparent AI illustration

Doping-doping ricefishUp to 3.6 cm · 24–28 °CMale flank blotches darken during courtship; eggs are not brooded until hatching.

Evers’ ricefish, non-nuptial adult male, left-facing AI illustration

Evers’ ricefishUp to 3.8 cmSubtle silver outside breeding; females carry attached eggs until hatching.

Javanese ricefish, natural adult male with yellow tail bands, left-facing AI illustration

Javanese ricefishUp to 3.5 cm · 24–29 °CBlue eyes and yellow tail bands; verify the stock’s salinity history first.

Mekong ricefish, natural adult male, left-facing AI illustration

Mekong ricefishUp to 2.1 cm · 23–27 °CA slender translucent ricefish with orange-red upper and lower tail edges.

Dwarf ricefish, adult male, left-facing AI species illustration

Dwarf ricefishUp to 1.7 cm · 22–25 °CA tiny translucent ricefish with a fine golden line and bright eyes.

Clouded ricefish, natural adult male in a dark state with olive-brown flanks and smoky fins, left-facing transparent AI illustration

Clouded ricefishUp to 3.3 cm · 25–30 °CA Lake Poso ricefish with darkening males and rock-associated spawning.

Black ricefish, natural adult male with a slender dark-grey body, left-facing transparent AI illustration

Black ricefishUp to 5 cm · 25–30 °CA dark Lake Poso male; open water, companions and several small meals matter.

Sarasin’s ricefish, natural adult male with silver lateral stripe and extended dorsal and anal fin rays, left-facing transparent AI illustration

Sarasin’s ricefishUp to 6 cm · 24–29 °CA long silver stripe and extended male fin tips; females carry eggs until hatching.

Songkhram ricefish, adult male with pectoral-base spot and orange-black tail bands, left-facing AI illustration

Songkhram ricefishUp to 2 cm · 23–30 °COrange-black tail bands plus a pectoral-base spot; a red tail alone is insufficient.

Wolasi ricefish, adult male, left-facing AI species illustration

Wolasi ricefishUp to 3.5 cm · 23–27 °CBlue iridescence with a red-gold rear body; separate it from Daisy’s ricefish.

Daisy’s ricefish, adult male, left-facing AI species illustration

Daisy’s ricefishUp to 3 cm · 23–27 °CSteel-blue sides, an orange-red belly edge and red tail margins.

Ricefish species and medaka varieties: what differs?

A variety and a species are different things

Japanese ricefish, Oryzias latipes, include domestic forms such as the golden variety. Daisy’s ricefish, O. woworae, is a separate species, not a blue medaka variety. Resolve the scientific name before interpreting a colour label. This gallery uses species entries; different colours do not increase the species count, and an ambiguous sales name remains a question to investigate.

Look beyond the blue sheen

Daisy’s ricefish combines a blue sheen with reddish-orange fin markings. Adult males are generally more colourful and have longer dorsal and anal fins than females. A paler individual is therefore not automatically a different species. Compare sex and stage, marking positions and body proportions. The apparent intensity of blue in a photograph is not enough for identification.

Check temperature species by species

The referenced Japanese and Daisy’s ricefish profiles give different temperature recommendations. Do not extend experience with one species to the entire genus. Resolve identity and origin, then consult the relevant profile. When comparing measurements, also check whether they describe routine care, an observation or an unresolved value.

Carrying eggs is not livebearing

Japanese ricefish females can carry eggs externally for a time before depositing them on plants or other surfaces. This differs from giving birth to fry. Follow the profiles below for the individual species rather than transferring one breeding routine to every ricefish. The gallery introduces the distinctions; the profile supplies the specific context.

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