By far the most popular squeaker catfish (Synodontis) is the upside-down catfish (Synodontis nigriventris). The species comes from the Congo, where it colonizes the central section of the river (including Pool Malebo, the former Stanley Pool); the settlement area also includes the basins of the Kasai, Ubangi and Kouilou-Niari rivers. It is not the only species of the genus that often (by no means always) swims on its back, but it remains small by squeaker standards (under 10 cm) and is one of the most peaceful members of the genus. It is important to keep them in groups of preferably more than 10 individuals, as this species is very social. These fish even communicate with each other by making creaking noises, which they also make in a loud protesting voice when they are caught and lifted out of the water with a net.
The large eye indicates it: these catfish like it dim. The aquarium should therefore not be lit too brightly, otherwise the fish will hide.
In terms of food and water values, blotched upside-down catfish are unproblematic, they eat any common fish food and feel comfortable in any tap water suitable for drinking. The water temperature should be between 22 and 28°C. There are hardly any external sex differences. In animals of the same age, the females are larger and fuller once they reach sexual maturity (at 5-6 cm in length). Upside-down catfish spawn hidden, they are free spawners and do not practise brood care.
For our customers: the animals have code 183402 on our stock list. Please note that we only supply the wholesale trade.
Text & Photos: Frank Schäfer
