A hardy, adaptable, and robust South American cichlid. They are relatively peaceful compared to larger cichlids but become highly territorial when breeding. Known for their oval-shaped body, greyish-green coloration, and a distinct black mid-lateral spot. They naturally sift through the substrate and require sandy bottoms.
Black Acara At a Glance
Black Acara Tank Requirements
Will Black Acara fit in your tank?
Care guides tell you what Black Acara needs, the next question is whether your tank can safely provide it. Test Black Acara against your tank size, maintenance needs, and the fish you already keep before you buy.
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Black Acara Water Parameters
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Black Acara Temperament & Compatibility
Black Acara Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard (Unsexed)
The standard commercial presentation. Commonly sold as juveniles before definitive sexual dimorphism develops. Keep singly, or as a mated pair if tank size permits.
Differs in 1 trait from base species
Also known as: Juvenile
Male
Adult males grow slightly larger and develop more extended, pointed dorsal and anal fins. They are the primary defenders of the territory.
Differs in 3 traits from base species
Also known as: Adult Male, Bull
Female
Females are slightly smaller, stockier in the belly area, and possess more rounded fins compared to males. Marginally less aggressive outside of spawning.
Differs in 3 traits from base species
Also known as: Adult Female
Black Acara Care Guide Summary
The Black Acara, scientifically known as Cichlasoma bimaculatum, belongs to the Cichlids - South American family group. Adults reach a maximum size of approximately 15 cm and have a compressed body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a high level of biological waste.
To thrive, the Black Acara requires a freshwater only aquarium with a minimum volume of 115 litres and a tank length of at least 80 cm. Water temperature should be maintained between 22°C and 28°C, with a pH range of 6–7.5 and a general hardness of 4–15 dGH. A low water flow is preferred.
Due to its specialist needs, the Black Acara is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 3 varieties: Standard (Unsexed), Male, and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Black Acara Habitat Setup
When setting up an aquarium for the Black Acara, a low water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour, smooth gravel or rounded substrate to protect their sensitive barbels, and driftwood, which can serve as both a hiding place and a dietary supplement. Keepers should note that expect substrate disturbance, so lightweight décor should be secured.
Black Acara Compatibility Notes
Classified as semi-aggressive, the Black Acara is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.
Black Acara Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Black Acara.
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
Show 10 more tank sizes
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Frequently Asked Questions About Black Acara
How big does Black Acara get?
Black Acara (Cichlasoma bimaculatum) typically reaches a maximum adult size of approximately 15 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Black Acara need?
A minimum aquarium volume of 115 litres and a tank length of at least 80 cm are recommended for Black Acara. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Black Acara need?
Black Acara thrives in freshwater only conditions with a temperature range of 22–28°C, a pH between 6 and 7.5, and a general hardness of 4–15 dGH. A low water flow is preferred.
Is Black Acara peaceful or aggressive?
Black Acara is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Black Acara live alone?
Yes, Black Acara can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Black Acara have any special tank requirements?
Yes. Black Acara benefits from sand (sifters), driftwood (digestion/hiding), and smooth gravel (sensitive barbels) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Black Acara
These plants pair well with Black Acara based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Amazon Frogbit
Limnobium laevigatum
Asian Watergrass
Hygroryza aristata
Asian Watermoss
Salvinia cucullata
Carolina Mosquito Fern
Azolla caroliniana
Common Duckweed
Lemna minor
Crystalwort
Riccia fluitans
Fish Similar to Black Acara
Blue Acara
Andinoacara pulcher
A stunning and relatively peaceful South American cichlid. While they possess classic cichlid traits—such as digging and territoriality during breeding—they are generally far more tolerant of tank mates than their larger cousins (like the Green Terror). They will, however, eagerly consume any fish small enough to fit in their mouths (like Neon Tetras).
Port Acara
Cichlasoma portalegrense
The Port Acara is a hardy, medium-sized South American cichlid. Known for being relatively peaceful compared to other cichlids of its size, it makes an excellent entry-level cichlid for community tanks with appropriately sized tank mates. They display subtle but beautiful iridescent green and blue spangling. During breeding, they become territorial and will dig pits in the substrate, potentially uprooting unsecured plants.
Checkerboard Cichlid
Dicrossus filamentosus
A striking, slender South American dwarf cichlid known for its distinct black checkerboard pattern along its flanks. Unlike many cichlids, they are exceptionally peaceful community fish. They are strict blackwater species, requiring very soft, acidic water, sand substrate, and leaf litter to thrive.
Green Terror
Andinoacara rivulatus
A large, incredibly colorful, and highly aggressive South American cichlid. Known for their striking metallic green/blue scales and vibrant orange or white tail margins. As their name suggests, they are highly territorial and require very careful tankmate selection, usually only coexisting with other large, robust cichlids or armored catfish in very large tanks.
Dwarf Flag Cichlid
Laetacara curviceps
A small, colorful, and surprisingly peaceful dwarf cichlid native to the Amazon Basin. Known for their 'smiling' facial markings and iridescent blue/green flanks. Unlike many of their larger cousins, they are excellent community fish, though they may become mildly territorial when breeding.
Cutteri Cichlid
Amatitlania cutteri
A stunning, robust Central American cichlid known for its striking blue eyes, vertical barring, and metallic sheen. While generally considered less aggressive than its close cousin the Convict Cichlid, it is highly territorial during breeding. They form monogamous pairs and are excellent, albeit fierce, parents that will actively dig out spawning pits.