Description
The Keyhole Cichlid (Cleithracara maronii) is a peaceful and attractive South American species, ideal for community aquariums. Native to the calm, slow-moving rivers and floodplains of the Orinoco and Amazon basins, it is named for the distinctive black "keyhole" marking on its body. Its gentle nature and modest size make it a popular choice for both beginner and experienced aquarists.
Features of Keyhole Cichlid
-
Grows up to 10–12 cm in length
-
Pale golden to beige body with a distinctive black keyhole-shaped marking
-
Rounded fins and a shy, peaceful disposition
-
Shows subtle colour changes based on mood or during breeding
-
Hardy and adaptable when kept in stable water conditions
The Best Aquarium Size for Keyhole Cichlid
A tank of at least 100 litres is recommended for a pair or small group, providing enough space for swimming and territory without stress.
Tank Mate Compatibility for Keyhole Cichlid
Keyhole Cichlids are very peaceful and do best with calm, non-aggressive species such as:
-
Tetras (e.g., Rummy Nose, Ember, Cardinal)
-
Corydoras catfish
-
Dwarf gouramis
-
Bolivian Rams
-
Peaceful livebearers like Platies
Avoid large, aggressive cichlids or fin-nipping species.
Diet for Keyhole Cichlid
Omnivorous and easy to feed. A balanced diet includes high-quality flakes or pellets, supplemented with frozen or live foods like bloodworms, brine shrimp, and daphnia for optimal health and coloration.
Aquarium Setup for Keyhole Cichlid
Aquarium Filtration
Use gentle but effective filtration. These fish prefer calm waters similar to their natural slow-moving habitats.
Aquarium Plants
Live plants such as Java fern, Amazon swords, and Anubias are ideal. Keyholes will not usually disturb plants and appreciate cover.
Aquarium Lighting
Low to moderate lighting replicates their natural environment and helps reduce stress.
Aquarium Heating
Keep the water temperature stable between 24°C and 27°C.
Aquarium Substrate
Use fine sand or smooth gravel to mimic riverbed conditions. Darker substrates help bring out their colour.
Aquarium Decorations
Add driftwood, caves, and smooth rocks to provide hiding spots and help the fish feel secure. A well-decorated tank encourages natural behaviour and breeding.
