Synodontis dhonti
Last revised 2026Edit this page
On this page11 sections
Quick factsEdit
Difficulty4 of 8 measures
- Space
- large tank
- Water
- needs a steady pH
- Temp
- needs a steady temperature
- Diet
- unknown
- Temperament
- territorial
- Social
- unknown
- Compatibility
- unknown
Other demands
Each of these can raise the rating on its own, whatever the measures above say.
- Hardiness
- unknown
Synodontis dhonti is a large Synodontis catfish endemic to Lake Tanganyika, where it lives in deep water down to at least 100 metres. Its deep-water habitat and solitary lifestyle make collection difficult, so it is rarely seen for sale. Juveniles may be confused with other Tanganyikan Synos but lose their spotted patterning as they mature. It grows to 400 mm SL, though usually much smaller in aquaria, and is territorial with its own kind.
Distribution
EditThis species is endemic to Lake Tanganyika.
Habitat
Write a noteEditNaturally inhabits deep water areas upto at least 100 metres where there is very little light. For this reason, dhonti will be more active in the aquarium in lower light conditions or in tanks where plenty of cover is available.
Aquarium size
Write a noteEdit120 ∗ 45 ∗ 38 cm48 ∗ 18 ∗ 15 in - ~205 litres~54 US gal).
Maintenance
Write a noteEditShould be housed in a Lake Tanganyika biotope setup, with piles of rocks arranged to form caves and areas of open water for swimming. Dim lighting will encourage the fish to be seen more often; otherwise ensure there is plenty of cover for these fish in the form of rocky areas and caves as previously mentioned.
Water conditions
EditTemperature: 24 – 28 °C75 – 82 °F
pH: 7.5-8.5
Hardness: 15-35 dH
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Diet
Write a noteEditSynodontis are omnivorous and are most unfussy in terms of feeding. Frozen, live and dried foods are all accepted. It also relishes vegetable matter in the form of shelled peas, cucumber etc., which it will rasp at with the teeth in its lower jaw.
Behaviour and compatibility
Write a noteEditShould not be kept with any fish so small as to be considered food but makes a good addition to a community of larger hard water cichlids, ideally of Tanganyikan origin. It is territorial with conspecifics and a group would require a suitably large tank.
Sexual dimorphism
Write a noteEditAdult females are plumper than males. It can also be sexed by examining the genital papillae. This is not for the amateur however. The fish should be held ventral side up in the palm of your hand. The dorsal fin should be taken between your middle and ring fingers in order to avoid being pierced by the sharp dorsal fin rays. The genital area you are looking for is concealed beneath the pelvic fins. This can be exposed by pulling (gently) on the caudal fin. A male fish will exhibit an extended papillae which should be pointed and ridged. The spermatoduct can be seen on the caudal side. Females also have a clearly visible papillae but this is more rounded and the oviduct is on the opposite side to the male's spermatoduct.
Most species of medium/large Synodontis can be sexed using this method but it should be noted that most species take 2 years or more to reach sexual maturity.
Reproduction
Write a noteEditNot recorded in aquaria. It is known to spawn in open water in nature and is an egg scatterer exhibiting no parental care.
Notes
EditS. dhonti's natural deep water habitat and solitary lifestyle make collection for the hobby difficult and so it is rarely seen for sale. When juvenile it may be confused with other Tanganyikan Synos but it loses its spotted patterning as it matures.
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Also missing: taxonomic authority, a common name, etymology.
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