Upside-Down Catfish — Fish Profile
Synodontis nigriventris
Quick Specs
| Adult Size: | 3.5" |
| Temperament: | peaceful |
| Care Level: | beginner |
| Min Tank Size: | 30 gallons |
| Temperature: | 72-82°F |
| pH Range: | 6.0-7.5 |
| Diet: | omnivore |
| Origin: | Central Africa (Congo Basin) |
| Lifespan: | 5-10 years |
Overview
Upside-Down Catfish are fascinating African catfish named for their habit of swimming inverted beneath driftwood and the water surface — a behavior that lets them graze algae and biofilm from the undersides of submerged wood. They have a mottled brown-and-cream pattern and are peaceful, nocturnal scavengers. Keep in groups of 3+ with plenty of driftwood and caves for daytime hiding.
Care Guide for Upside-Down Catfish
Tank Setup
Upside-Down Catfish requires a minimum tank size of 30 gallons. Maintain water temperature between 72°F and 82°F, with a pH range of 6.0 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Upside-Down Catfish with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Upside-Down Catfish is a omnivore feeder. Provide a varied diet appropriate for omnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as peaceful. Upside-Down Catfish reaches an adult size of 3.5 inches and has a care level of beginner. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Upside-Down Catfish originates from Central Africa (Congo Basin) and has an expected lifespan of 5-10 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
Compatibility Results for Upside-Down Catfish
All 69 compatibility checks involving Upside-Down Catfish:
Recommended for Upside-Down Catfish
Hikari Sinking Wafers — $11.99Sinking wafers for nocturnal catfish
Expert Care Tips for Upside-Down Catfish
- Mid-size tank: Upside-Down Catfish needs 30+ gallons. Choose a tank at least 2× as long as the fish's adult size (3.5") for adequate swimming room.
- Warm-water species: Upside-Down Catfish prefers 72–82°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Adaptable pH range: Upside-Down Catfish accepts pH 6.0–7.5. Most tap water falls within this range, but always test and acclimate slowly.
- Peaceful community fish: Upside-Down Catfish works well in community tanks. Still, avoid housing with fish large enough to eat them — a 3.5" fish is vulnerable to anything with a mouth bigger than 2×.
- Acclimation: Always drip-acclimate Upside-Down Catfish over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.