Upside-down catfish

Synodontis nigriventris

FreshwaterFish

Care at a glance

Temperature
75–82°F (24–28°C)
pH
6.0–7.5
Adult size
3.9 in (10 cm)
Minimum tank
30 gal (115 L)
Temperament
Peaceful
Social behavior
Schooling
Swim level
Bottom
Difficulty
Beginner
Breeding
No record
Rarity
Rare
Origin
Congo Basin
Family
Mochokidae

Overview

Keep a group of at least five. They feel safer in numbers, and you will see them out more. They are bottom-oriented but will cruise upside down along the surface and under leaves and wood. They are peaceful and nocturnal, so feed after lights-out with sinking pellets, frozen bloodworms, and some plant matter. Plan on around 115 liters or more, and pair them with calm tankmates that share the same warm, soft water.

In the wild

This catfish comes from the slow, warm waters of the Congo Basin, where it hangs around submerged roots, branches, and thick plant cover. To match that, give it driftwood, caves, and some shade in the tank. Keep the water in the mid 20s C and the pH on the soft, slightly acidic to neutral side (around 6 to 7.5).

Good to know

It belongs to the Mochokidae family, the African upside-down catfishes, and tops out around 10 cm. Breeding in home tanks is rarely documented, so most fish in the trade are commercially raised. It can live well over a decade with good care. The common name comes from its habit of swimming belly-up, which is unusual among catfish.

Did you know

Its countershading is flipped compared to most fish. The belly is darker than the back, which makes sense because the fish spends so much time inverted. Seen from above, the dark belly blends with the bottom, and from below the lighter back blends with the bright surface.

Appears in

Freshwater fish · Beginner fish · Schooling fish · Community fish · Bottom dwellers

Keeping Upside-down catfish?

Track water tests, reminders and stocking fit.

Sign in or Start a tank →

Related species