Geophagus pellegrini Breeding Guide

Breeding notes for 'Geophagus' pellegrini, a Colombian yellowhump eartheater that is an ovophilous maternal mouthbrooder.

Overview

'Geophagus' pellegrini, the yellowhump eartheater, is endemic to northwestern Colombia, recorded from the Rio San Juan at Tado in Choco Department and neighbouring Antioquia, with records from the Rio Atrato and Rio Baudo drainages. According to Seriously Fish it reaches about 130-155 mm standard length and inhabits shallow forest streams 2-5 metres wide with moderate to fast-flowing water over sand, gravel and clay.

Sexing

Seriously Fish reports that males grow larger overall and develop longer unpaired fin lobes. Sexually mature males develop a nuchal hump, which can be very pronounced in some individuals, providing a practical way to distinguish the sexes.

Breeding Setup

Seriously Fish lists a temperature of 25-30 degrees C, a pH of 5.0-6.0 and hardness of 0-90 ppm for this species. A breeding tank should provide soft, acidic, warm water with a sand substrate and open, flat surfaces, reflecting the forest-stream habitat. The Aquairi record classifies the species as a mouthbrooder of intermediate breeding difficulty.

Spawning Behavior & Trigger

Seriously Fish describes 'Geophagus' pellegrini as an ovophilous, maternal mouthbrooder that forms only weak pair bonds during spawning. In ovophilous mouthbrooders the eggs are taken into the mouth early in the spawning sequence; the female carries and incubates the brood.

Common Challenges

Because the female alone broods the eggs and only weak pair bonds form, harassment by the male or other tankmates can interrupt spawning, so adequate space matters. Beyond the maternal mouthbrooding classification, the source does not provide specific egg counts, brooding durations or detailed fry-rearing protocols, which are therefore omitted.