Overview
The Koi Carp (Cyprinus rubrofuscus) is a intermediate freshwater species known for its multi-color (red, white, black, gold patterns) coloration. Pond fish. All levels.
Origin & Appearance
Origin: Japan.
Colors: Multi-color (Red, White, Black, Gold patterns).
Body Shape: Deep Fusiform (oval/robust). Typical adult dimensions: 90.0 x 18.0 x 36.0.
Sexual Dimorphism: Subtle; males develop breeding tubercles in spring.
Tank & Water Requirements
| Min Tank Size | 1321 gallons |
| Temperature | 59–77°F |
| pH Range | 7–8 |
| Water Hardness (GH) | 8-20 |
| Bioload | very-high |
| Oxygen Demand | high |
| Plant Safe | mostly |
| Aquarium Position | All levels |
Behavior & Activity
Strong steady mid-to-bottom cruiser; powerful tail beats for continuous swimming; surface feeding gulps; intelligent patrol routes
Speed: 50/100Aggression: 2/10diurnalSchooling (3+)
Breeding
Moderate; egg scatterer; needs cold period
Common Diseases
💊 Ich
Expert Notes
Pond fish; extremely long-lived