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Species profile

Keyhole Cichlid

Cleithracara maronii

Common names: Keyhole Cichlid

Recognized speciesCichlids
Keyhole Cichlid (Cleithracara maronii)

Adult size

Up to 12 cm

Typical adult length 8–12 cm.

Up to 12 cm

Countries of origin

  • See all stock from French Guiana
  • See all stock from Guyana
  • See all stock from Suriname
  • See all stock from Trinidad and Tobago
  • See all stock from Venezuela

Good fit for your tank?

Good fit for

  • Mature planted aquarium setups
  • Beginner shrimp keepers

Think carefully if

  • The aquarium contains shrimp-eating fish
  • The tank is newly cycled
  • Water conditions change frequently

A shy, peaceful Guianan cichlid recognised by a keyhole-shaped flank mark and suited to calm planted communities.

Appearance and Identification

A beige to olive cichlid with a dark keyhole-shaped flank blotch, subtle bars, and blue-green iridescence.

The keyhole-shaped flank mark and rounded body are characteristic. Stress can darken the entire fish.

Males may be larger with more pointed dorsal and anal fins. Females become fuller before spawning.

Tank Requirements

Suggested filter
About 300–450 litres an hour
Suggested heater
About 150–225 W for this tank
Minimum tank volume
150 litres
Minimum tank length
100 cm
Minimum group size
2
Recommended group size
4
Activity level
Moderate
Flow preference
Low
Planting preference
Moderately planted
Hiding places
Yes
Lid recommended
Yes
Jumping risk
Low

Provide plants, wood, leaf litter, shaded retreats, open swimming areas, and a calm community. A group or compatible pair needs visual security.

Behaviour and Tankmates

Peaceful and cautious, often darkening or hiding when alarmed.

Can be kept as a pair or small group in a spacious calm aquarium.

Breeding pairs defend a modest area around eggs and fry.

Suitable with peaceful tetras, pencilfish, rasboras, and calm catfish. Tiny shrimp and fry may be eaten.

Check tankmates for this species

Water Parameters

Temperature
23–28 °C
pH
5–7.5
GH
1–12
KH
0–6
TDS
30–220
Stability importance
Important

Soft slightly acidic water is preferred, though captive fish tolerate moderate mineral content when stable.

Parameter caveat
Avoid aggressive or fast boisterous tank mates because shy fish may stop feeding.

Feeding

Diet types
Insectivore, Omnivore
Feeding frequency
Daily
Preferred foods
  • Live baby brine shrimpUseful for conditioning adults and feeding juveniles; rinse before use.
  • Daphnia, cyclops, or mosquito larvaeSmall moving prey encourages natural feeding behaviour.
  • Frozen brine shrimp or mysisOffer thawed portions sized for the fish.
  • High-quality cichlid micro-pelletUse as part of a varied diet after the fish accepts prepared food.

An omnivore taking small invertebrates, plant matter, and prepared foods.

Use sinking and slowly falling foods so shy fish can feed without competition.

Breeding

Breeding type
Egg Layer, Substrate Spawner
Breeding difficulty
Moderate
Breeding temperature
26 °C
Breeding pH
6.5
Brood or egg count
About 200 to 400 eggs.
Incubation
3 days
Parental care
Biparental care
Baby foods
  • Newly hatched brine shrimpPrimary food for free-swimming fry; feed small rinsed portions several times daily.
  • MicrowormsUseful supplementary food for small fry near the substrate.
  • Fine powdered fry foodUse sparingly and remove uneaten material.

A biparental substrate spawner. Eggs are laid on a flat stone, leaf, or wood surface and guarded by both parents.

Habitat and Origin

Geographic origin
French Guiana, Guyana, South America, Suriname, Trinidad and Tobago, Venezuela
Natural habitat
Floodplain, Freshwater Stream, Slow River, Vegetated Shoreline
Aquarium contexts
Breeding Aquarium, Freshwater Aquarium, Freshwater Community, Planted Aquarium
Audience level
Beginner

Classification

Profile type
Recognized species
Genus
Cleithracara
Family
Cichlidae
Species group
Cichlids, Fish, South American Cichlids
Previous scientific names
Aequidens maronii, Historic generic placement used in older aquarium literature.

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