Spathodus erythrodon Breeding Guide

Breeding Spathodus erythrodon, a surf-zone Tanganyikan goby cichlid: biparental mouthbrooding with the brood transferred from female to male.

Overview

Spathodus erythrodon is a surf-zone goby cichlid endemic to Lake Tanganyika (absent from the southern end), reaching about 8.5 cm (3.3 in) TL and preferring rubble or pebble substrates in very shallow water, usually less than 0.3 m deep (Wikipedia). It is one of the eretmodine goby cichlids, which - except for Spathodus marlieri - practise biparental mouthbrooding in which the female broods eggs and early fry before the male takes over the larger fry (peer-reviewed review of eretmodine parental care).

Sexing

Reliable external sexing of this species is not documented in the consulted whitelisted sources and is therefore omitted. As with related goby cichlids, raising a group to allow a natural pair to form is the practical route to breeding fish.

Conditioning

Condition this grazing species on a vegetable-rich diet supplemented with small invertebrate foods, with strong oxygenation matching its very shallow, fast-flowing surge-zone habitat (Wikipedia for habitat).

Breeding Setup

Provide a shallow, rocky, well-oxygenated aquarium with vigorous current. A bonded pair holds and defends a territory; both parents participate in incubation, which is the defining feature of the eretmodine goby cichlids (peer-reviewed review).

Egg & Fry Care

Brood care is biparental: the female broods the eggs and early fry, then transfers the developing larvae to the male, who continues incubation until release (peer-reviewed review). Note: precise egg counts and brooding durations specific to S. erythrodon were not confirmed in a whitelisted source, so the egg-transfer mechanics here are presented at the eretmodine goby cichlid level.

Common Challenges

The species is rare in the hobby and demanding to keep, requiring very high oxygenation and strong flow. Establishing a stable pair and supporting the small, slow-developing broods typical of goby cichlids make this an advanced breeding project.