Japanese rice fish
📖 Overview
Adults occur in ponds, marshes, paddy fields and small flows of plains . They prefer slow-moving streams. Inhabit mainly waters of lowlands and brackish water, and also known to inhabit tide pools of coasts of certain regions in Japan and Korea. They can withstand a wide range of salinity . Omnivorous . For indoor culture, a diluted sea water is rather better than the freshwater , and the use of a balanced salt solution is recommended, if the tap water proves to be unsuitable . Used in experimental research . Non-annual breeders. Are easy to maintain in the aquarium . A fluorescent ornamental variety (genetically modified fish), a product of fluorescent protein extracted from jellyfish and attaching to DNA in embryonic fish of this is now being sold in the aquarium trade .
🔬 Taxonomy
🐟 Physical Description
Dorsal soft rays (total): 6 - 7; Anal soft rays: 15 - 21; Vertebrae: 30 - 31. Meristic characters mainly from Nam Theun, Laos sample only . Scale count refers to the scales in longitudinal row .: elongated.
🌀 Behaviour
Behavioural data for Japanese rice fish is currently being reviewed.
🦐 Diet
🥚 Reproduction
Carries eggs for some time before deposition . Oocytes mature at night followed by ovulation at dawn .
🌍 Habitat & Distribution
Freshwater; brackish; benthopelagic; pH range: 7.0 - 8.0; dH range: 9 - 19; amphidromous . Subtropical; 18°C - 24°C ; 55°N - 10°N, 85°E - 105°E
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🍽️ Edibility & Flavour
"Japanese rice fish is an edible species."
- Clear, bright eyes — cloudy eyes indicate age
- Firm flesh that springs back when pressed
- Fresh ocean smell, never strong or ammonia-like
- Bright red or pink gills, not grey or brown
- Shiny, moist skin with scales tightly attached
- Cloudy or sunken eyes
- Strong fishy or ammonia odour
- Soft, mushy flesh that doesn't spring back
- Discoloured or dry flesh
⚡ Nutrition
Detailed nutritional data for Japanese rice fish is currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Japanese rice fish has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)
📊 Population Dynamics
| Year | Region | Index | Notes |
|---|---|---|---|
| - | - | - |
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Japanese killifish · Japanese medaka · Japanese rice fish · Japanese Ricefish · Medaka · Moonlight Medaka · ricefish |
| 🌍CES | medaka japonská |
| 🇩🇰Danish | Japansk risfisk |
| 🇩🇪German | Japan-Reiskärpfling · Japanischer Goldhecht · Japanischer Reisfisch · Japankärpfling · Japankärpling · Medaka · Südlicher Killifisch · Südlicher Medaka |
| 🇯🇵Japanese | Minamimedaka · ミナミメダカ · メダカ · メダカ（目高） · メダカキタニホンシュウダン · メダカミナミニホンシュウダン |
| 🇰🇷Korean | 송사리 |
| 🇵🇱Polish | Ryzanka japonska · ryżówka japońska |
| 🇷🇺Russian | Японская оризия |
| 🌍THA | ปลาซิวข้าวสารญี่ปุ่น |
| 🇨🇳Chinese | 彈魚 · 稻田魚 · 米鱂 · 米鱂，稻田魚 · 青鱂 · 魚目娘 |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 227 records indexed .
👥 Community & Contribute
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