Granulated synodontis
Synodontis granulosus
Also known as Granular catfish, Granulosa squeaker
Care at a glance
- Temperature
- 73–81°F (23–27°C)
- pH
- 8.0–9.0
- Adult size
- 10.6 in (27 cm)
- Minimum tank
- 79 gal (300 L)
- Temperament
- Aggressive
- Social behavior
- Solitary
- Swim level
- Bottom
- Difficulty
- Difficult
- Breeding
- No record
- Rarity
- Very rare
- Origin
- Endemic to Lake Tanganyika in East Africa.
- Family
- Mochokidae
Overview
The granulated syno is a legendary, costly catfish that grows to a good size and turns territorial and aggressive toward other bottom dwellers as an adult, so it is usually kept as a single specimen. It suits a large hard-water Tanganyikan setup with robust cichlids that can hold their own. It demands clean, stable, alkaline water and reacts badly to neglect. Feed quality sinking foods, frozen items, and some greens, and plan on a tank of at least 300 liters.
In the wild
Synodontis granulosus is a prized endemic of Lake Tanganyika, living over rocky coasts in hard, alkaline, oxygen-rich water. It needs a large, mature tank with piled rockwork, a sandy floor, high pH, and pristine stable conditions at 23 to 27 degrees C. It is intolerant of poor water quality, so heavy filtration and consistency matter.
Good to know
This squeaker reaches around 27 cm and has a slate-gray to olive body with a fine granular skin texture and, in juveniles, a spotted pattern that fades with age. It is one of the most sought-after and expensive Synodontis in the hobby. Wild fish grow slowly, and there is no home breeding record.
Did you know
It is one of the holy grail catfish of the hobby, with adults commanding high prices, partly because it is slow-growing, rarely exported, and never yet bred in captivity.
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
Appears in
Keeping Granulated synodontis?
Track water tests, reminders and stocking fit.
Related species

Cuckoo squeaker
Synodontis multipunctatus9.8 in (25 cm)50 gal (190 L)75–82°F (24–28°C)
Giant upside-down catfish
Synodontis batensoda11.8 in (30 cm)79 gal (300 L)72–81°F (22–27°C)
Lake Malawi syno
Synodontis njassae7.5 in (19 cm)40 gal (150 L)73–82°F (23–28°C)Poll's synodontis
Synodontis polli7.1 in (18 cm)50 gal (190 L)72–79°F (22–26°C)
One-spot synodontis
Synodontis notatus9.8 in (25 cm)53 gal (200 L)72–81°F (22–27°C)
Decorated squeaker
Synodontis decorus11.8 in (30 cm)53 gal (200 L)72–81°F (22–27°C)
