Black Bar Endler Breeding Guide

Breeding the wild-type Black Bar Endler (Poecilia wingei): sexing, ~23-day broods, fry care and keeping the line pure from guppy hybridisation.

Overview

The Black Bar Endler is a wild-type form of Poecilia wingei (family Poeciliidae), recognised by a single bold vertical black bar and an orange caudal in the male. Endler's livebearer is a small ovoviviparous fish that gives birth to live young roughly every 23 days and is closely related to the guppy (Poecilia reticulata).

Sexing

Males are small and patterned, developing colour at about 3-4 weeks with full richness over six months, and bear a gonopodium for internal fertilisation. Females are plainer and can grow to roughly twice the size of males.

Conditioning

An omnivore, it conditions well on fine flake, micro live or frozen foods, and grazing on algae and microorganisms on plants. Stable, slightly hard alkaline water supports continuous breeding.

Breeding Setup

Mixed-sex groups breed without special triggers. Because this is a wild-type line, purity matters most: P. wingei readily crosses with guppies (P. reticulata) and the hybrids are fertile, so the two species should never share a tank. Dense planting protects fry and offers grazing.

Mating & Gestation

Males fertilise females internally via the gonopodium, and females give birth to live young approximately every 23 days.

Birth & Fry Care

Broods range from 1 to about 30 fry depending on the mother's age and size. Newborn fry consume their yolk sac on the bottom in the first hours and are most vulnerable to predation then, including from the mother and other females; males are less cannibalistic. Feed powdered fry food, baby brine shrimp, crushed flake, algae and plant microorganisms.

Common Challenges

Large births can stress females, sometimes leading to grey colouration, deterioration and death. For wild-type stock the dominant concern is hybridisation with guppies, which produces fertile crosses that erode the natural genotype.