Utsuri Koi - Cyprinus carpio

Utsuri Koi (Cyprinus carpio) are traditional Japanese koi featuring bold, high-contrast color patterns of black (sumi) overlaid with red, white, or yellow, depending on the variety (Hi Utsuri, Shiro Utsuri, or Ki Utsuri). Their striking patterns and flowing fins make them a standout in any pond or large tank.

Description:

Common Name: Utsuri Koi

Scientific Name: Cyprinus carpio

Family: Cyprinidae

Size: Up to 24–36 inches (60–90 cm)

Temperament: Peaceful

Difficulty: Easy to Moderate

Native Region:

Originally from Eastern Asia; selectively bred in Japan

Aquarium or Pond Setup:

Tank Size/Pond: Minimum 250 gallons; ponds preferred for adult size

Temperature: 59–77°F (15–25°C)

pH: 6.8–8.2

Hardness: Moderate

Decor: Smooth rocks and shallow areas for resting; good oxygenation and UV sterilization recommended.

Additional Tips:

• Behavior: Social and active; best kept in groups.

• Tankmates: Ideal with other koi or large goldfish.

• Diet: Omnivorous – feed koi pellets, leafy greens, fruit, and protein-rich treats like shrimp.

• Care: Excellent filtration and regular water changes needed; they produce a lot of waste.

• Outdoor Care: Hardy in outdoor ponds year-round if deep enough to avoid freezing.