Albino Guppy Breeding Guide

Breeding the Albino Guppy (Poecilia reticulata), a red-eyed livebearer strain, including sexing, gestation, fry care and fixing the albino trait.

Overview

The Albino Guppy is a selectively bred form of Poecilia reticulata (family Poeciliidae) showing reduced melanin and red eyes. Like all guppies it is a livebearer using internal fertilisation and giving birth to live fry. The albino condition is a heritable recessive trait carried through the line rather than a wild-type feature.

Sexing

Mature males are smaller, 1.5-4 cm long, with ornamental caudal and dorsal fins and a gonopodium, the modified tubular anal fin used for sperm transfer. Females are larger, 3-7 cm long, with simpler fins and a gravid spot near the vent that darkens during pregnancy; in albinos this spot may appear less pigmented.

Conditioning

These omnivores breed readily on a varied diet of quality flake plus small live or frozen foods. Keep stable slightly hard alkaline water (pH 7-8.5) and a temperature of about 25-27.8 C, the range at which guppy gestation has been recorded, to maintain breeding condition.

Breeding Setup

Mixed-sex groups spawn without special triggers. Because the albino trait is recessive, both parents must carry it to reliably produce albino fry, so keep a dedicated albino line and avoid introducing unrelated pigmented stock. Dense planting or floating cover gives newborn fry refuge.

Mating & Gestation

Males court females or use forced sneaky matings, passing sperm bundles through the gonopodium. Females store sperm in the ovaries and gonoducts and can keep fertilising eggs for up to eight months, yielding several broods from one mating. Gestation lasts about 20 to 60 days at 25-27.8 C.

Birth & Fry Care

Broods range from 2 to 200 fry, typically 30 to 60. Well-fed adults rarely eat their young, but plants or a safe zone raise survival. Fry take powdered food and newly hatched brine shrimp and mature in three to four months; males mature in about 7 weeks, females first breed at 10-20 weeks. Albino fry can be sensitive to bright light.

Common Challenges

Continuous breeding leads to rapid population growth and crowding. The recessive albino genetics mean carrier fish look normal, so maintaining a true albino line requires careful pairing and culling of non-albino offspring.