Medaka are one of Japan's most popular ornamental fish. Selective breeding has produced many beautiful varieties. This guide covers what to know before purchasing medaka.
Himedaka $0.50-$2, Youkihi $3-$10, Premium varieties $10-$100
View detailed price data →Medaka thrive in sunlight. Biotope setups are also recommended.
Prices vary significantly by grade even within the same variety.
They lay eggs easily, so breeding is fun. Prepare spawning mops.
Shipping in extreme summer or winter is risky. Choose mild seasons to buy.
💧 Aquarium Volume Calculator
Calculate water volume, weight, and heater wattage from tank dimensions
🧪 Water Quality Checker
Find compatible fish, shrimp, plants & corals based on pH, temperature & hardness
📅 Breeding Calendar
Visual monthly breeding season guide for each species
🤝 Compatibility Checker
Check compatibility between two species on a 5-level scale
📊 Fish Compatibility Matrix
Check fish compatibility at a glance with our matrix chart
🗓️ Seasonal Care Calendar
Monthly care events and seasonal management tips at a glance
🚿 Water Change Calculator
Auto-calculate optimal water change frequency and volume by tank size and fish count
🐠 Stocking Calculator
Calculate max fish capacity for your tank size with overstocking alerts
🩺 Symptom Checker
Select symptoms to diagnose possible diseases and remedies
🧬 Breeding Planner
Select parent varieties to view breeding schedules and offspring patterns
🏞️ Tank Layout Planner
Get substrate, plant & hardscape suggestions based on tank size and style
🧮 Care Cost Simulator
Estimate initial, monthly & annual costs by category, care level and quantity
⚖️ Species Comparison Tool
Compare two species side by side: care difficulty, size, lifespan & temperature
🎯 Pet Match Diagnostic
Answer 7 questions to find your top 3 perfect pets
📋 Lifetime Cost Simulator
Estimate lifespan and lifetime costs by species for dogs, cats, reptiles and more
🚚 Transport Safety Checker
Check transport safety score and precautions by category, season, method and distance
💊 Medication Dosage Calculator
Calculate proper medication dosage by body weight and medicine type for fish, reptiles, and small animals
If you have questions about care, you can ask experienced keepers and breeders on the Care Q&A Board. If you notice health issues, try the Symptom Checker.