Cichla monoculus Breeding Guide

Breeding biology of the peacock bass Cichla monoculus, a large biparental substrate spawner impractical to breed at home.

Overview

Cichla monoculus is a peacock bass native to the Amazon basin and widespread across Brazil, Ecuador, Colombia, Peru, Venezuela and French Guiana; it has also been introduced to Florida and Hawaii. It reaches 80 cm in length and about 9 kg in weight, and like all peacock bass it is a substrate-spawning, biparental cichlid.

Sexing

In Cichla, many adults, primarily males but also some females, develop a pronounced forehead (nuchal) hump shortly before and during the rainy season when spawning occurs.

Spawning Behavior & Trigger

Peacock bass generally spawn during the rainy season. As substrate spawners, pairs clean and prepare a hard surface and deposit their eggs there, with reproduction tied to the seasonal flood pulse of the rivers.

Egg & Fry Care

The genus shows biparental care: one or both parents vigilantly guard the eggs and the fry school against predators, a behavior documented across Cichla species.

Common Challenges

The very large adult size and predatory temperament make pair formation and brood rearing in home aquaria unrealistic; controlled reproduction is achieved in pond and aquaculture settings.