Clown Synodontis

Synodontis decorus

Photo of aquarium fish Clown Synodontis
Natural range
  • Congo River Basin
  • Democratic Republic of the Congo area
  • Republic of the Congo area
  • Cameroon area
CatfishConservation status: Least concern LC

Family:Fringe-lipped Catfish (Mochokidae)

Other scientific names: Synodontis vittatus

Synodontis decorus, known as the Flag Synodontis or Clown Synodontis, belongs to the family Mochokidae. This species is one of the most striking representatives of the Synodontis genus and can adorn almost any large freshwater aquarium. Its qualities, such as a peaceful disposition, unpretentiousness, and adaptability to various water conditions, significantly expand the range of potential tank mates.

Required aquarium volume
200 L
Size in aquarium
30 cm
Temperature
22 – 27 °C
Temperament
Semi-peaceful (including aggression during spawning / intraspecific conflicts)
Parameters
Temperature22 – 27 °C
Water pHSlightly acidic (6) – Slightly alkaline (8)
Water dHVery soft (3) – Very hard (25)
Water salinityno salt (freshwater)
Size in aquarium30 cm
Lifespan12 years
TemperamentSemi-peaceful (including aggression during spawning / intraspecific conflicts)
Toward small fishnot a predator
Required aquarium volume200 L
Lightingdimmed or moderate
Substratesoft peat-based
Water flowweak or moderate
FeedingSinking (any)
CareBoth solitary and in group (flexible)

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Clown Synodontis get?

An adult reaches 30 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Clown Synodontis need?

The minimum recommended volume is 200 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Clown Synodontis need?

Temperature 22–27 °C, pH 6–8, hardness 3–25 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Clown Synodontis live?

Around 12 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Clown Synodontis aggressive?

Temperament: semi-peaceful (including aggression during spawning / intraspecific conflicts). Keep this in mind when choosing tank mates.

How many Clown Synodontis should be kept together?

Recommended setup: both solitary and in group (flexible). Ignoring this is a common cause of stress and disease.

What does Clown Synodontis eat?

Diet type: sinking (any). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Clown Synodontis?

The scientific name of the species is Synodontis decorus, family Fringe-lipped Catfish (Mochokidae). It also appears in the literature as: Synodontis vittatus.

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