Overview
The Ricefish / Medaka (Oryzias latipes) is a beginner freshwater species known for its gold-orange (also white, blue variants) coloration. Cold-tolerant. Surface to Mid.
Origin & Appearance
Origin: East Asia.
Colors: Gold-Orange (also White, Blue variants).
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 4.0 x 0.7 x 1.2.
Sexual Dimorphism: Moderate; males have larger fins.
Tank & Water Requirements
| Min Tank Size | 5 gallons |
| Temperature | 59–82°F |
| pH Range | 6.5–8 |
| Water Hardness (GH) | 5-20 |
| Bioload | very-high |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Surface to Mid |
Behavior & Activity
Surface-to-mid swimmer; gentle cruising in groups; calm and unhurried; eggs hang from female like grapes
Speed: 35/100Aggression: 1/10diurnalSchooling (6+)
Breeding
Easy; eggs hang from female
Common Diseases
💊 Ich
Expert Notes
Cold-tolerant; many color varieties