Upsidedown Catfish
Synodontis batensoda
Also known as: Squeaker
A large African catfish that genuinely swims upside down as its default mode.

About
The upsidedown catfish (Synodontis batensoda) is one of those fish that makes visitors do a double-take, because swimming belly-up is not a sign of distress here. It's simply how this species gets around. That inverted posture is thought to be an adaptation for feeding at the water's surface, where it can pick off insects and other morsels with ease. In the wild, it ranges widely across West and Central Africa, turning up in major river systems including the Nile, Niger, Senegal, Gambia, and Chad basins, so it's a species accustomed to a broad range of conditions across a large geographic footprint. Beyond the novelty of its swimming style, this is a genuinely capable omnivore that will work through algae, detritus, planktonic material, and meaty foods like crustaceans and small invertebrates. It's a solidly built catfish that can reach a respectable size, so tankmates should be chosen with that in mind. Smaller fish may eventually become a meal. Synodontis in general are known for producing audible squeaking sounds when handled, and batensoda is no exception. Intermediate-level experience is a reasonable baseline, mostly because of its size requirements and the need to think carefully about compatible tankmates.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Upsidedown Catfish
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Upsidedown Catfish get?
- The Upsidedown Catfish reaches about 6–7" as an adult.
- What size tank does the Upsidedown Catfish need?
- A minimum of 55 gallons is recommended for the Upsidedown Catfish, with more room needed for a proper group.
- What water parameters does the Upsidedown Catfish need?
- The Upsidedown Catfish does best with a temperature of 72–82°F, a pH of 6–8, hardness around 4–25 dGH.
- Is the Upsidedown Catfish aggressive?
- The Upsidedown Catfish is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Upsidedown Catfish eat?
- The Upsidedown Catfish is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Upsidedown Catfish live?
- With good care, the Upsidedown Catfish typically lives 5-10 years.