Keyhole Cichlid

Cleithracara maronii

Photo of aquarium fish Keyhole Cichlid
Natural range
  • Guyana area
  • Suriname area
  • Orinoco Delta area
  • Trinidad area
CichlidsConservation status: Least concern LC

Family:Cichlids (Cichlidae)

Other scientific names: Acara maronii, Aequidens maronii

The Keyhole Cichlid, scientifically known as Cleithracara maronii, belongs to the Cichlidae family and is often referred to as the “Keyhole” cichlid. Despite its subdued coloration, this species is valued for its peaceful nature and ease of care, allowing it to play a supporting role in community tanks. These fish perfectly complement more colorful tankmates, and for beginner aquarists, they can serve as an excellent option for gaining initial experience.

Required aquarium volume
80 L
Size in aquarium
7 – 11 cm
Temperature
21 – 28 °C
Temperament
Peaceful (regular)
Parameters
Temperature21 – 28 °C
Water pHAcidic (4) – Neutral (7.5)
Water dHVery soft (2) – Hard (15)
Water salinityno salt (freshwater)
Size in aquarium7 – 11 cm
Lifespan8 years
TemperamentPeaceful (regular)
Toward small fishnot a predator
Required aquarium volume80 L
Lightingany
Substratesandy (regular, light)
Water flowweak or moderate
FeedingAny (universal)
CareMixed (solitary / pair / group)

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Keyhole Cichlid get?

An adult reaches 7–11 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Keyhole Cichlid need?

The minimum recommended volume is 80 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Keyhole Cichlid need?

Temperature 21–28 °C, pH 4–7.5, hardness 2–15 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Keyhole Cichlid live?

Around 8 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Keyhole Cichlid aggressive?

Temperament: peaceful (regular). Keep this in mind when choosing tank mates.

How many Keyhole Cichlid should be kept together?

Recommended setup: mixed (solitary / pair / group). Ignoring this is a common cause of stress and disease.

What does Keyhole Cichlid eat?

Diet type: any (universal). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Keyhole Cichlid?

The scientific name of the species is Cleithracara maronii, family Cichlids (Cichlidae). It also appears in the literature as: Acara maronii, Aequidens maronii.

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