The Upside-Down Catfish (Synodontis nigriventris) is a fascinating freshwater species, famous for its unusual habit of swimming upside down, particularly when feeding near the water surface or resting beneath leaves and driftwood. Its mottled brown and dark markings provide natural camouflage, while its distinctive swimming behaviour makes it a unique addition to the aquarium.
Native to the Congo River Basin in Central Africa, this peaceful and active catfish spends much of its time exploring shaded areas and searching for food. It is best kept in a well-established aquarium with plenty of hiding places and sheltered spaces.
Scientific Name: Synodontis nigriventris
Common Name: Upside-Down Catfish
Origin: Congo River Basin, Central Africa
Temperament: Generally peaceful
Diet: Omnivore – sinking pellets, algae and frozen foods
Care Level: Easy to Moderate
Adult Size: Approximately 8–10cm
Tank Setup: Planted aquarium with driftwood, caves and shaded areas
Temperature: 22–28°C
pH: 6.0–7.5
Water Hardness: Soft to moderately hard
Water Quality: Clean, stable and well-filtered
Upside-Down Catfish are omnivorous bottom-dwellers that accept a wide variety of foods. Offer quality sinking catfish pellets, algae wafers and occasional frozen foods such as bloodworms, brine shrimp and daphnia. A varied diet helps maintain their health and condition.
Provide plenty of driftwood, caves, broad-leaved plants and shaded hiding places. Upside-Down Catfish are particularly fond of resting beneath surfaces and exploring sheltered areas throughout the aquarium.
They are generally peaceful and can be kept with other compatible community fish. They are social by nature and often do well in small groups when sufficient space and hiding places are available. Avoid housing them with aggressive or predatory fish that may bully or threaten them.
