Uaru amphiacanthoides
Uaru
Last revised 2026Edit this page
On this page11 sections
Quick factsEdit
Difficulty5 of 8 measures
- Space
- very large tank
- Water
- needs a steady pH
- Temp
- needs warm water, held steady
- Diet
- unknown
- Temperament
- peaceful
- Social
- unknown
- Compatibility
- unknown
Other demands
Each of these can raise the rating on its own, whatever the measures above say.
- Hardiness
- needs a well-established tank
- Needs 27 °C or warmer
- Needs a very large tank
The uaru, Uaru amphiacanthoides, is a large cichlid from the Amazon basin in northern Brazil and Guyana, found in clear water tributaries. It occurs in the middle to lower Rio Negro and along the Solimões and main Amazon between the Japurá and Tapajós. Surprisingly peaceful for its size, it needs clean, well-filtered water at the higher end of the temperature scale.
Distribution
EditHabitat
Write a noteEditFound in clear water tributaries, often around submerged branches or tree roots.
Aquarium size
Write a noteEditFor a pair 48" x 18" x 15" (120cm x 45cm x 37.5cm) 200 litres..
Maintenance
Write a noteEditA large roomy aquarium with a sand or gravel substrate and decorated with bogwood and roots is preferred. Leave unplanted as most aquatic plants will be eaten.
Water conditions
EditTemperature: 82 to 86f (27 - 30°C)
pH: pH 6 to 7
Hardness: Soft - upto 5°dH
Diet
Write a noteEditStomach analyses of wild fish have revealed it to be an omnivore existing on a substantial amount of plant matter along with an assortment of invertebrates and even freshwater sponges. However experiments with captive fish suggest it's primarily herbivorous
Behaviour and compatibility
Write a noteEditSuprisingly peaceful for such a large cichlid. Can be safely housed with smaller fish such as tetras. Ideal tankmates include Angels (altum and scalare), heros, geophagus, satanoperca and the larger characins (headstanders, prochilodus, metynnis). Any tank mates should be able to handle the higher tempratures uaru require.
Sexual dimorphism
Write a noteEditThese fish are not sexually dimorphic
Reproduction
Write a noteEditWild caught Uaru will require water paramaters that mirror their natural habitat(very soft and acidic). Captive bred fish will be less fussy. Spawning accures on a flat rock or peice of bogwood.
Young Uaru will readily feed off the parent fishes' slime coat, in a manner much the same as Discus.
Notes
EditA large, peaceful South American cichlid. Uaru can make very interesting aquarium subjects.
They require clean, well filtered water on the higher end of the temprature scale.
Avoid keeping with overly aggressive fish, Uaru are happiest when kept in groups or pairs.
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