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Cichla orinocensis

Orinoco Peacock bass

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Last revised 2026Edit this page

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Quick factsEdit

Length
600mm SL24in SL
Tank base
not recorded
Temp
27–29°C81–84°F
pH
5.5–6.5
Hardness
5–15dGH

Difficulty5 of 8 measures

Difficult

How the rating is worked out

Space
very large tank
Water
needs acidic water, kept steady
Temp
needs warm water, held steady
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
hardy
  • Needs 27 °C or warmer
  • Needs a tank at least 2 m long

The Orinoco peacock bass, Cichla orinocensis, is a predatory cichlid from the Orinoco basin in Venezuela and Colombia and the Rio Negro in Brazil. One of the smaller peacock bass, it still grows to around 60 cm and needs a tank of at least 8 x 3 x 3 feet as an adult. It is territorial and moderately aggressive and will eat any tankmate small enough to be considered food.

Distribution

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Native to the Rio Orinoco basin in Venezuela and Colombia, and the Rio Negro in Brazil.

Found in varying habitats in the Amazon basin

Aquarium size

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Standard length
600mm SL24in SL
Aquarium base
not recorded

One of the smaller Peacock Bass, however a large tank is still required. Ultimately, this fish will require a tank of at least 8'x3'x3' (l x h x w) for an adult fish. Smaller aquaria can be used for younger specimens but realistically you should not acquire this fish if you cannot house it long term.

Maintenance

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This species requires a lot of swimming space, so it is a good idea to furnish the tank fairly sparsely. Large pieces of bogwood and robust plants are recommended. These are large messy fish and require filtration that is up to the job. External or sump filtration should be considered.

Water conditions

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Temperature
27–29°C81–84°F
pH
5.5–6.5
Hardness
5–15dGH

Temperature: 27 – 29 °C81 – 84 °F

pH: 5.5 - 6.5

Hardness: 5 - 15°H

Piscivorous in nature. The diet should consist of meaty foods such as prawn, mussel, lancefish, whitebait and other white fish.

Behaviour and compatibility

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Territorial and moderately aggressive. Can be kept in species groups or with other large species such as arowana, stingrays, large cats and other large cichlids. An extremely large tank is required to achieve this with any degree of success.

Will eat tankmates small enough to be considered food.

Sexual dimorphism

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The male is larger and develops a nuchal hump as he matures.

Reproduction

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Limited reports of breeding in the hobby.

Notes

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Due to their large size, Peacock Bass are only really recommended for the experienced fishkeeper that can house them adequately. That said, they are a hardy and robust species that will adapt to a variety of conditions.

Peacock Bass are becoming much more available in the hobby and are often seen for sale as cute 2" babies, often tempting people into buying a fish they will not be able to care for in the long term.

Peacock Bass are also fished as a sport fish.

Distribution

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