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No federal permit to keepMalawi squeaker
Synodontis njassae
Fishes › Catfish (Siluriformes) › Mochokidae (Synodontis and squeaker catfish)
The Malawi squeaker (Synodontis njassae) is a species of upside-down catfish endemic to Lake Malawi.
Care at a glance
Species-specific aquarium care
- Tank: At least 36 in long and 15 in front to back for one adult (adults commonly reach about 7.6 in / 19.2 cm).
- Water: Freshwater.
- Temperature: 68–73°F (range recorded for this species).
- pH: 7.5–8.2.
- Hardness: 20–30 dGH.
- Layout: Uses both the bottom and open water: give open swimming space plus cover near the substrate.
- Diet: Eats a varied diet: mix quality prepared foods with frozen and live foods. FishBase classes it as a carnivore.
Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.
Care guide
Species care notes
- Tank: a base of at least 47 × 12 in (roughly 29 US gallons); space needed is rated “large tank”.
- Water: hard, alkaline water, 73–82 °F, pH 7.5–8.5, 20–30 dGH.
- Difficulty: Moderate (Seriously Fish rating).
Short excerpts from the species profile:
- Setup: “Should be housed in a Lake Malawi biotope setup, with piles of rocks arranged to form caves and areas of open water for swimming.”
- Diet: “Synodontis are omnivorous and are most unfussy in terms of feeding.”
- Tankmates: “Should not be kept with any fish so small as to be considered food but makes a good addition to a community of robust hard water cichlids, ideally of Lake Malawi in origin.”
- Breeding: “Not recorded in aquaria and little is known of its natural breeding habits.”
From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167
Synodontis and squeaker catfish
Applies to most species in this group. Habitat: African mochokids include Synodontis from vegetated riverbanks and distinct species from rocky habitats in the East African Rift lakes. Individual species can differ, so compare with the species numbers above and the linked sources.
Housing & setup
- For a small S. nigriventris group, provide at least 75 × 30 × 30 cm (30 × 12 × 12 in), about 70 litres; larger species need more space.
- Use sand or another soft substrate to protect sensitive barbels.
- Provide plentiful daytime shelters: wood and roots for river species, rock caves for Rift-lake species.
- For S. nigriventris, use dim lighting and broad-leaved or floating vegetation with sheltered undersides for inverted resting.
- Separate water-chemistry plans: S. nigriventris is listed at pH 6.0–7.5 and 5–20 dGH; S. petricola at pH 7.5–8.5 and 10–35 dGH.
Climate & lighting
| Water | 75–82°F |
Diet
- Complete dried foods appropriate to adult size.
- Live or frozen aquatic foods as part of an omnivorous diet.
- Shelled peas or cucumber; S. nigriventris may also feed inverted at the surface.
Social life
- Keep S. nigriventris in groups of at least three or four and S. petricola in groups of four or more. Larger Synodontis can be territorial toward other catfish and eat small tankmates; provide separate shelters and ample space.
Health watch
- Barbel damage associated with abrasive substrate.
- Ammonia-related illness in poorly maintained systems.
- Nutritional deficiencies from an unbalanced diet.
Understanding the animal
About this animal
About this animal
This species grows to a total length of 19.2 cm (7.6 in). This species is a minor component of local commercial fisheries and can also be found in the aquarium trade.
Quoted from the Wikipedia article “Malawi squeaker” (CC BY-SA 4.0) 174
In the wild
In the wild
From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.1
| Where it lives | Lives in freshwater, in lakes. Uses both the bottom and open water. Found among the rocks during the day and moves around the area at night. Feeds on insects, crustaceans and other invertebrates. |
| Water it lives in | Freshwater, 68–73 °F (20–23 °C), pH 7.5–8.2, hardness 20–30 dH. |
| Climate | Tropical climate. |
| Behavior to plan for | Breeding: open water/substratum egg scatterers. |
What this means for care
- Keep water within its wild range, 68–73 °F.
Native climate (measured)
Native climate (measured)
| Warm-season highs | about 88°F (up to 92°F in the hottest sampled areas) |
| Cool-season lows | about 59°F (down to 55°F in the coldest sampled areas) |
| Average temperature | 71–76°F across sampled records |
| Relative humidity | 67–69% on average (driest month about 55%) |
| Rainfall | about 1240 mm a year, with strong wet and dry seasons |
Measured at 32 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.
From the sources
From the sources
Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.
| Where it lives | Home ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase |
| Reproduction | Distinct pairing during breeding. — FishBase |
| Biology | Found among the rocks during the day and moves around the area at night. Feeds on insects, crustaceans and other invertebrates. Because of its bony head, this species is often not marketed in Malawi where it is relatively common and considered a favored food of fishermen. — FishBase |
Data and studies
The numbers
The numbers
Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.
Adult length
Maximum recorded length. Measured as total length. Fish in home aquariums often stay smaller than wild records.
Water temperature
Range the species tolerates in nature; aim for the middle.
Minimum tank footprint
Seriously Fish recommends a tank base of at least 47 × 12 in (about 29 US gallons).
Sources for this sheet
- FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
- Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
- Seriously Fish — synodontis nigriventris Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Seriously Fish — synodontis petricola Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Practical Fishkeeping — Frequently asked questions on Synodontis Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Merck Veterinary Manual — Disorders and Diseases of Fish Zoo, university or veterinaryAdded in the 2026 source-checked care-guide review.
- Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.
- iNaturalist (captive observations) Community referenceCommunity observation platform run by the California Academy of Sciences and National Geographic; observations marked captive show animals living in homes, zoos and aquariums.
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