Synodontis
A large African genus of spotted catfish known for squeaking sounds and belly-up swimming.
Synodontis is the largest group of mochokid catfishes with over 131 species. These freshwater fish are native to Africa and are popular in aquariums and as food sources.
- Over 131 recognized species exist in this genus.
- Fish squeak by rubbing pectoral fin spines together.
- Some species swim upside down naturally.
- Found in freshwaters across sub-Saharan Africa.
- Popular as both aquarium pets and food fish.
What it is
This genus contains more than one hundred thirty-one recognized species of catfish. They are small to medium-sized fish often marked with attractive spots. Many species swim upside down, earning them the nickname upside-down catfish. Others produce a squeaking noise by rubbing pectoral fin spines together when disturbed or handled. Their bodies are typically triangular or cylindrical from the side, featuring a distinct ventral mouth.
Where it lives
These catfish inhabit freshwaters across sub-Saharan Africa. They are found in the Nile River system and throughout Central and West Africa. Their range includes creeks, ponds, streams, lakes, and rivers. A specific radiation exists in Lake Tanganyika, evolving relatively recently. Unlike cichlids, their diversity is concentrated in rivers rather than lakes.
How it lives
They are omnivorous generalists feeding on insects, crustaceans, mollusks, annelids, seeds, and algae. As bottom-feeders, they may also act as detritivores or filter feeders. This diet allows adaptation to seasonal changes. Females are generally larger than males. Growth is rapid in the first year then slows. Some species, like Synodontis multipunctatus, act as brood parasites.
Breeding and life cycle
Reproduction occurs between July and October. Spawning coincides with the flooding period of the rainy season. Fish swim in pairs during this time. Little detailed information exists about their reproductive biology beyond these seasonal patterns.
Fish and people
Many species are prized ornamental fish in the aquarium hobby due to their color and behavior. Larger species serve as important food sources for local populations in Africa. The genus accounts for about one-quarter of African catfish species.
Status and threats
The genus is widespread and common across its range. No specific conservation threats are highlighted in the provided text. Fossil records show sturdy spines preserved from the Early Miocene in East Africa.
Questions people ask about Synodontis
Why are some Synodontis called squeakers?
They make stridulatory sounds by rubbing their pectoral fin spines together. This happens when they are frightened, angry, or taken out of water.
What do Synodontis catfish eat?
They are omnivorous generalists. Their diet includes insects, crustaceans, mollusks, annelids, seeds, and algae. They feed at the bottom of water bodies.
Where are Synodontis catfish found?
They live in freshwaters throughout sub-Saharan Africa. This includes the Nile River system, lakes, rivers, streams, and ponds in Central and West Africa.
Are all Synodontis catfish similar in behavior?
No. Some swim upside down. One species, Synodontis multipunctatus, is a brood parasite. Others are cuckoo catfish that lay eggs in other fish nests.
Good reading and sources
The facts on this page come from the Wikipedia article "Synodontis", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
