Upside-Down Catfish

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingAttentive tank care

  Sensitive to water quality — stay on top of testing and maintenance.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment8–12 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Parasites

The Upside-Down Catfish (Synodontis nigriventris) comes from the Congo basin and reaches about 8 to 10 cm. Its inverted swimming is a genuine adaptation for feeding from the undersides of submerged branches and leaves, and it comes with reversed countershading: the belly is dark because it faces the light, and the back is pale. It is one of very few vertebrates whose camouflage is flipped this way. Keep a group of four or more in 100 litres or more at 23-28C, pH 6.0 to 7.8, with driftwood, broad-leaved plants and overhangs to hang beneath, plus dim or shaded lighting. Feed sinking pellets, frozen bloodworm, brine shrimp and some flake, best offered in the evening. It is peaceful, sociable within its own species and safe with any fish too large to swallow, making it a genuinely good community catfish. As with all Synodontis, move it in a container rather than a net because of the locking spines.

• How active is a Upside-Down Catfish?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Upside-Down Catfish need?

  Attentive tank care. Sensitive to water quality — stay on top of testing and maintenance.

• What tank size does a Upside-Down Catfish need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Upside-Down Catfish a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Upside-Down Catfish live?

  8–12 years. Plan for a long, loving relationship.

• What health issues affect the Upside-Down Catfish?

  Keep an eye out for Ich (white spot), Fin rot, Parasites. These are worth raising with your vet, along with any screening they recommend.

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