Marbled Synodontis
Synodontis schoutedeni
Also known as: Yellow Marbled Synodontis
A beginner-friendly Congo catfish with bold marbled patterning that deepens with age.

About
Acropora horrida is one of the less-known.. just kidding. Synodontis schoutedeni is a mid-sized catfish from the Congo River system, particularly the middle Congo, Pool Malebo, and the Kasai drainage, with additional records from the Kouilou-Niari basin in the Republic of Congo. Also known as the Marbled Synodontis or Yellow Marbled Synodontis, it carries a detailed vermiculated pattern across its body that tends to become more pronounced as the fish matures and settles into good conditions. One of the more visually rewarding developments you can watch happen in a tank. Despite being listed as aggressive and territorial, it is actually quite workable in a community setting as long as tankmates are large enough to hold their own. Anything under two inches is potentially at risk. Alestiid tetras, peaceful cichlids like Pelvicachromis species, mormyrids, gouramis, and larger barbs or rasboras are all reasonable companions. Boisterous Rift Lake cichlids are a poor match. Each fish does best with its own dedicated hiding spot, and groups can coexist if that condition is met. One practical note worth keeping in mind: this species has a noted tendency toward bloating, so a diet heavy in dried foods is best avoided. Breeding in captivity is not well documented, though the species scatters eggs and provides no parental care.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Marbled Synodontis
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Marbled Synodontis get?
- The Marbled Synodontis reaches about 4–6.5" as an adult.
- What size tank does the Marbled Synodontis need?
- A minimum of 21 gallons is recommended for the Marbled Synodontis.
- What water parameters does the Marbled Synodontis need?
- The Marbled Synodontis does best with a temperature of 72–79°F, a pH of 6–7.5, hardness around 3–15 dGH.
- Is the Marbled Synodontis aggressive?
- The Marbled Synodontis is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
- What does the Marbled Synodontis eat?
- The Marbled Synodontis is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.