Synodontis dhonti Breeding Guide

Reproduction of the Lake Tanganyika endemic Synodontis dhonti is largely undocumented; home breeding is not established and likely not feasible.

Overview

Synodontis dhonti is a mochokid catfish endemic to Lake Tanganyika, where it is recorded from the Democratic Republic of the Congo. It occupies rocky shorelines as well as sandy and shell-covered bottoms. The largest documented specimen measured 32.5 cm standard length (about 39.5 cm total length). Like other members of the genus it is omnivorous, taking insect larvae, algae, gastropods, bivalves, sponges, crustaceans and the eggs of other fishes.

Sexing

Reliable visual sexing is not described in the available sources. Females tend to be slightly larger than males of comparable age, but this difference is not a dependable field marker.

Spawning Behavior & Trigger

For the genus, spawning is reported to occur during the flooding season, broadly between July and October, with pairs swimming in unison during spawning. Many Synodontis reproduce in step with the rising water of the rainy season. These observations are general to the genus; specific spawning data for Synodontis dhonti is not available.

Egg & Fry Care

No documented account of egg or fry development exists for this species. Reproductive knowledge for the genus is generally limited to egg counts obtained from gravid females, so no fry-rearing procedure can be described from the sources.

Common Challenges

The principal obstacle is the absence of an established spawning method. Synodontis dhonti reaches a large adult size and is territorial as a mature fish, which compounds the difficulty of pairing and conditioning in captivity. Several Lake Tanganyika Synodontis belong to the lineage that includes the brood-parasitic cuckoo catfish (Synodontis multipunctatus), which spawns alongside mouthbrooding cichlids; however, that brood-parasitic strategy is documented for S. multipunctatus and not for S. dhonti.