Platytaeniodus degeni Breeding Guide

Breeding Platytaeniodus degeni, a sand-foraging Lake Victoria maternal mouthbrooder kept mainly as a conservation strain, with a genus-level spawning guide.

Overview

Platytaeniodus degeni (sometimes placed in Haplochromis pending review) is a haplochromine endemic to Lake Victoria, foraging over sandy and shingly substrates in littoral and sublittoral zones to about 15 m depth, and reaching about 15.4 cm SL; the IUCN lists it as Least Concern. FishBase records maternal mouthbrooding. Species-specific aquarium breeding accounts are limited, so this guide applies the well-documented Lake Victoria haplochromine breeding pattern.

Sexing

As in related Victorian haps, males are the colourful sex and females are duller and the sole investors in parental care, with mature males bearing egg-spot markings on the anal fin. Detailed sexual-colour description specific to this species is limited in the sources reviewed.

Conditioning

In the wild this species takes benthic material along with insect larvae, copepods, ostracods and small crustaceans from sandy bottoms, so condition adults on a varied omnivore diet. Stable hard, alkaline Victorian water supports spawning readiness.

Breeding Setup

Use the standard Victorian-hap approach: a species tank with one male and several females, with open sand (matching its sandy-substrate habits) and some rockwork so a male can hold and display over a territory. Multiple females spread out courtship aggression.

Spawning Behavior & Trigger

Spawning follows the Lake Victoria haplochromine pattern: a male displays at his site, the female lays eggs and takes them into her mouth, and the male's anal-fin egg spots prompt collecting behaviour during which fertilisation occurs orally.

Egg & Fry Care

The female incubates the eggs and larvae in her mouth; Lake Victoria haplochromines typically hold for roughly two to three weeks before releasing free-swimming fry, which take small first foods such as brine shrimp nauplii. A holding female can be isolated to protect the brood.

Common Challenges

Because exact brood numbers and incubation timing for this species are not well documented, observe holding females directly and use genus-level figures as a guide. Keep it apart from other Victorian haps to prevent hybridisation in this conservation-oriented strain.