Granulosus Synodontis Care Guide
Synodontis granulosus is a finely speckled catfish endemic to Lake Tanganyika, requiring hard alkaline water and robust tankmates.
Compiled by Aquairi from published sources · Published · Updated
Overview
Synodontis granulosus is an upside-down catfish of the family Mochokidae, endemic to Lake Tanganyika and recorded from the Democratic Republic of the Congo, Burundi, Zambia and Tanzania. Standard length reaches about 21.6 cm, total length about 27 cm. The species name derives from the Latin granulum (grain), a reference to the granular papillae on the skin.
Taxonomy
- Family: Mochokidae
- Genus: Synodontis
- Scientific name: Synodontis granulosus
- Describer: Boulenger, 1900
Habitat
The species inhabits littoral to benthic zones of Lake Tanganyika over shell, sand and mud substrates, recorded to depths of about 130 m but typically between 20 and 40 m. Tanganyika water is hard and alkaline, with FishBase listing a temperature range of 22–26 °C.
Tank requirements
- Minimum tank volume: 400 L
- Temperature: 24–27 °C
- pH: 7.8–9
- GH: 10–20 °dGH
- Adult size: 20–25 cm
- Lifespan: 8–15 years
Diet
Synodontis granulosus is omnivorous, with a trophic level near 2.9. The genus feeds on insect larvae, algae, gastropods, bivalves, sponges, crustaceans and fish eggs. A varied prepared and frozen diet suits aquarium specimens, offered once daily.
Compatibility
A bottom-oriented, nocturnal catfish that becomes semi-aggressive once mature. It is best kept with sturdy rift-lake cichlids rather than small, delicate fishes. Caves and subdued lighting support its natural behaviour.
Breeding
The species is oviparous with distinct pairing during breeding; spawning in the genus is associated with the July–October flooding period. Aquarium reproduction is rarely documented.
Conservation status
IUCN Red List: Least Concern, assessed 23 February 2025.
Synodontis granulosus Breeding Guide
Overview
Synodontis granulosus is endemic to Lake Tanganyika, recorded from the Democratic Republic of the Congo, Burundi, Zambia and Tanzania. It occupies littoral to benthic zones over shell, sand and mud, most commonly between 20 and 40 m depth and down to about 130 m. Maximum standard length reaches 21.6 cm (about 27 cm total length). As an omnivore it feeds on insect larvae, algae, gastropods, bivalves, sponges, crustaceans and the eggs of other fishes.
Sexing
No reliable external sexing method is described in the available sources. Females are reported to be slightly larger than males of similar age, but this is not a dependable diagnostic.
Spawning Behavior & Trigger
At the genus level, spawning is reported during the flooding season between roughly July and October, with pairs swimming in unison. These observations are general and have not been tied to specific recorded spawns of Synodontis granulosus.
Egg & Fry Care
No account of egg or fry development is available for this species. Because reproductive knowledge for the genus is largely confined to egg counts from gravid females, no fry-rearing procedure can be given from the sources.
Common Challenges
The lack of an established spawning method is the chief barrier. Synodontis granulosus becomes semi-aggressive at maturity, complicating long-term pairing. It belongs to the Lake Tanganyika radiation that also contains the brood-parasitic cuckoo catfish (Synodontis multipunctatus); that parasitic strategy, in which catfish eggs are slipped into the clutch of mouthbrooding cichlids, is documented for S. multipunctatus and not for S. granulosus.