Species · Synodontis nigriventris

Upside-down catfish: tank size, water and tank mates

Gentle Synodontis that swims inverted; may eat tankmates under ~3 cm.

Adult size10 cm (3.9 in)
Minimum tank30 US gal
Temperature24–26 °C (75–79 °F)
pH6–7.5
Temperamentpeaceful
Keep in groups of5+
Swimsall
Shrimp & snailsCaution

Predator: may eat fish up to about 3 cm.

Check a tank with Upside-down catfish

Good tank mates for Upside-down catfish

These species share its temperature range and temperament, with no fin-nipping or predation risk under our rules. Still check your tank size and bioload in the checker.

African butterflyfish · African dwarf frog · Angelfish · Banjo catfish · Betta (male) · Black neon tetra · Black phantom tetra · Black ruby barb · Black skirt tetra · Bleeding heart tetra · Bloodfin tetra · Blue acara · Bristlenose pleco · Bronze corydoras · Buenos Aires tetra · Bumblebee goby · Cardinal tetra · Cherry barb · Clown killifish · Clown pleco · Cockatoo dwarf cichlid · Colombian tetra · Congo tetra · Diamond tetra

Avoid with Upside-down catfish

Boeseman's rainbowfish (temperature) · Celestial pearl danio (predation) · Chili rasbora (predation) · Common / comet goldfish (temperature) · Convict cichlid (aggression) · Demasoni cichlid (aggression) · Discus (temperature) · Dojo loach (temperature) · Ember tetra (predation) · Emerald dwarf rasbora (predation) · Endler's livebearer (predation) · Fancy goldfish (temperature) · German blue ram (temperature) · Gold barb (temperature) · Green neon tetra (predation) · Jack Dempsey (aggression) · Jewel cichlid (aggression) · Lambchop rasbora (predation)

Sources

Checked 2026-11-09 · confidence: medium. These are cautious community guidelines, not guarantees. Not veterinary advice. Report an error.