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Midnight Catfish

Auchenipterichthys thoracatus

Freshwater South America

The midnight catfish is a nocturnal driftwood catfish with an attractive spotted body and distinct pale markings. During daylight it stays tucked away inside hollow logs or rock crevices. It emerges under twilight to feed, and keepers must remember it will readily swallow small fish resting near the substrate after dark.

13 cm adult length, drawn to scale. torpedo body.

Try it in the planner Opens a tank sized to its minimum with 3 fish added.

What it needs

ItemValueBecause
Adult length 13 cm Used for the Space check: the tank must be long enough for the fish to turn round.
Smallest tank 150 L, at least 90 cm long estimated The least water and floor length this species is kept in for good, as a single fish or smallest group.
Extra water per added fish 25 L estimated What each further fish adds once the minimum is met.
Waste load Class 3 of 5 estimated How much waste an adult makes against its size. Feeds the Load check.
Temperature 22 to 28 C Stock sharing a tank need overlapping ranges.
pH 6 to 7.2 Compared with tankmates in the Water check.
Hardness GH 4 to 12, KH 2 to 6 Degrees of general and carbonate hardness.
Flow Medium Low-flow fish are stressed in a strong current.
Light Dim Matched to the lighting class on the needs sheet.
Group size At least 3, ideally 5 Kept alone or in small numbers it hides, fades or turns on tankmates.
Temperament Peaceful Not territorial.
Swims in Near the bottom Fish that use different levels share a tank more easily.
Lifespan About 8 years A fish is a long commitment.
Experience Some experience helps A guide to how forgiving the species is of mistakes.

Tags marked estimated are judged from the size and habits of the species rather than measured, so treat them as a sensible default.

Diet and tank layout

Midnight Catfish is an carnivore that swims in the lowest part of the tank. It is safe with plants. Give it plenty of cover. It will eat fish small enough to swallow.

Tankmates

Works with

No close matches in the data. Check the pair tool.

Depends

Avoid

Compare any two fish on the compatibility page, or print the equipment for a stock on the needs sheet. How this is worked out: the method.