Ginga Rubra Guppy Pairs (Poecilia reticulata)

Ginga Rubra Guppy (Poecilia reticulata) is a striking and rare strain of guppy developed by Japanese breeder Kenjiro Tanaka. Despite some confusion in the aquarium trade, Ginga Rubras are true guppies, not Endler hybrids. 

Species Overview

• Scientific Name: Poecilia reticulata
• Common Name: Ginga Rubra Guppy
• Origin: Selectively bred in Japan; wild ancestors from South America
• Family: Poeciliidae
• Type: Livebearer

Size & Lifespan

• Male Size: ~2.5 cm (1 inch)
• Female Size: ~3.8 cm (1.5 inches)
• Lifespan: Up to 2 years

Water Parameters

• Temperature: 18–29°C (65–85°F)
• pH: 6.5–8.5
• Hardness: 8–20 GH
• Water Type: Freshwater

Appearance

• Body Color: Blonde or grey base
• Markings: Reddish-pink bar-like blotches
• Fins: Snake-like patterns on dorsal and caudal fins
• Tail Variants: Short-tail, bottom sword, double swordtail
• Sexual Dimorphism:
  • Males: Smaller, more colorful, elongated anal fin
  • Females: Larger, duller, gravid spot visible when pregnant

Behavior & Compatibility

• Peaceful and active
• Best kept in groups of 5 or more
• Ideal for community tanks with other peaceful species
• Not suitable with aggressive or large fish

Diet

• Omnivorous
• Eats:
  • Flake food
  • Micro pellets
  • Frozen/live foods (brine shrimp, bloodworms)
  • Spirulina and algae-based foods

Breeding

• Livebearer: Gives birth to live fry
• Prolific breeders; fry can quickly overpopulate tanks
• Fry Care: Provide hiding spots or separate nursery tanks
• Sexual maturity: 2–5 months

Tank Setup Tips

• Well-planted tank enhances coloration
• Gentle filtration and stable water parameters
• Secure lid recommended (guppies may jump)
• Ideal for both beginners and experienced aquarists