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Blue Acara

Andinoacara pulcher

The Blue Acara (*Andinoacara pulcher*) represents the perfect alternative for those who are in love with the sparkling shapes and colors of the Green Terror, but do not own thousand-liter tanks nor wish to manage the murderous nature of "Monster Fish". Decidedly more contained (it stops around 15-16 cm / 6 inches), the Blue Acara is famous for being an exceptionally robust and tolerant cichlid. The body is greyish-blue crossed by weak dark vertical bands, but the cheeks and most of the flanks are illuminated by horizontal lines and dots of a brilliant iridescent blue (hence the name "pulcher", which in Latin means "beautiful"). In recent years the controversial artificial variety 'Electric Blue Acara', totally neon blue, has caught on.

Taxonomy
Class:Actinopteri
Order:Perciformes
Family:Cichlidae
Subfamily:Cichlasomatinae
Genus:Andinoacara
Species:Andinoacara pulcher*
* Comunemente noto col vecchio nome Aequidens pulcher

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Water Temperature

22 - 28 °C

pH Value

6.5 - 8

Water type

Freshwater

Tank level

Bottom and middle

Adult size

16 cm

Minimum tank volume

>= 180 L

Minimum group

>= 1

GH

4 - 15 dGH

KH

2 - 7 dKH

TDS

80 - 295 ppm

Conductivity

125 - 461 uS/cm

Species description

Geographical Origin and Habitat: Native to Central and South America (Trinidad and Tobago, Venezuela and Colombia). Frequents slow rivers, seasonal swamps and still water bodies with muddy substrates, abundance of submerged vegetation and uprooted trunks.
Taxonomy and Morphology: Blue Acara (Andinoacara pulcher / ex-Aequidens pulcher). The epithet "pulcher" means "beautiful". Classic laterally compressed profile typical of Acaras, with a convex skull. Morphologically solid, stocky, but at the same time elegant in its movements.
Social Behavior: Considered a "gentleman" among medium-sized South American cichlids. Generally placid and confident (approaches the glass to ask for food), but manifests a vigorous territoriality exclusively in the reproductive and offspring protection period.
Coloration and Sexual Dimorphism: Bright gray-green background furrowed by vertical dark bands (stress "tiger pattern") and massively dotted with a metallic blue-turquoise on the snout and flanks. Males slightly longer and more tapered, with "pointed" extensions on the anal and dorsal fin.

Care, breeding and tankmates

Aquarium Setup: Not a predator nor a massive "plant destroyer". 100-120 cm (40-48 inches) densely planted tank. Will not uproot species (Valisneria, Cryptocoryne) if anchored in sand or fine gravel. Flat stones (spawning sites) and curved woods are welcome.
Diet and Feeding: Micro-predator and ravenous omnivore. Consumes everything: quality balanced flakes, high-protein cichlid granules, freeze-dried brine shrimp. Excels in coloration if foraged often with beef heart (rarely), earthworms (washed) or thawed krill.
Water Quality: It is renowned for its very high tolerance to chemical fluctuations. Perfectly happy both in soft Amazonian waters and in common alkaline tap waters (up to pH 8.0 and moderate GH hardness). Excellent for beginners in the genus.
Compatibility and Cohabitation: Perfect for community tanks of appropriate size. Excellent partners are medium Plecostomus (like Bristlenose), large Corydoras (e.g. C. sterbai), and thick schools of robust tetras (Emperors, Bleeding Heart). Will ignore fish that don't fit in its mouth.
Aquarium Breeding: Among the easiest biparental Cichlids. Pairs (very faithful) clean a smooth stone laying up to 200 eggs on it. Extraordinary parental care: the mother ventilates, the father patrols. They will "relocate" the newborns in small holes in the sand.
Risks and Diseases: Extremely resistant to typical bacterial diseases, but the commercially hyper-reproduced variety (in particular the deformed crossbreed "Electric Blue Balloon") manifests frequent dwarfism, lethal spinal defects and hereditary blindness.

Geographic Origin and Distribution

Native to Central and South America (Trinidad and Tobago, Venezuela and Colombia). Frequents slow rivers, seasonal swamps and still water bodies with muddy substrates, abundance of submerged vegetation and uprooted trunks.

Origin

Extra-Amazon South AmericaCentral America and CaribbeanNorth AmericaEast Asia

Fish profile

Temperament
Semi-aggressive
The Blue Acara is considered one of the more peaceful medium-sized cichlids, making it suitable for community tanks. However, they can show mild territorial behavior, which intensifies significantly during breeding. Both parents will defend their spawning site vigorously against any intruders. Outside of reproduction, they generally exhibit a calm and inquisitive demeanor.
Diet
Omnivore
As opportunistic omnivores, Blue Acaras require a balanced diet consisting of both meaty foods and vegetable matter. High-quality cichlid pellets or flakes should serve as the staple diet, supplemented with live or frozen foods such as bloodworms, brine shrimp, and Mysis shrimp. They will also appreciate occasional offerings of earthworms or blanched vegetables like spinach. Providing a varied menu ensures they maintain vibrant coloration and good health.
Life expectancy
7-10 years
In captivity, the Blue Acara has a typical lifespan of 8 to 10 years when provided with high-quality care. Achieving their maximum lifespan requires maintaining stable water parameters, a stress-free environment, and a clean aquarium. Offering a varied, nutrient-rich diet also plays a critical role in supporting their immune system and preventing premature aging. Regular health checks and avoiding aggressive tankmates will further ensure they live a full, healthy life.
Sex ratio
ONE_TO_ONE
In a home aquarium, the Blue Acara is best kept in bonded monogamous pairs. Keeping them in a 1:1 male-to-female ratio is ideal to prevent aggression, particularly during the spawning season. If you are starting with juveniles, a small group of 5 to 6 individuals can be raised together until a compatible pair naturally forms. Once a pair is established, the remaining fish should be moved to separate tanks to avoid territorial conflicts.
Feeding frequency
Twice daily
It is recommended to feed adult Blue Acaras one or two times a day, offering only what they can consume within two to three minutes. Overfeeding should be strictly avoided as it leads to poor water quality and digestive issues. Juvenile fish are growing rapidly and benefit from smaller, more frequent meals, about three times daily. Fasting them for one day a week can also help regulate their digestive systems.
Bioload
Medium
The Blue Acara produces a moderate to high amount of biological waste due to its size and high-protein diet. An efficient filtration system, preferably a canister or strong hang-on-back filter, is essential to maintain low nitrate levels. Regular weekly water changes of 25% to 30% are highly recommended to prevent the buildup of toxins. Keeping the substrate clean is also vital since these fish frequently dig and stir up debris.
Flow
Stagnant
In their natural habitat, Blue Acaras are found in a variety of water flows, from still lakes to moderate river currents. In the aquarium, they prefer a gentle to moderate water flow that mimics their natural river basins. Strong currents should be avoided as they can exhaust the fish and make swimming difficult. Using spray bars or filter deflectors can help distribute the current evenly.
Jump risk
Yes
Although not notorious jumpers like surface-dwelling species, Blue Acaras are active, powerful fish that can easily leap out of the tank when startled or during mating chases. A tight-fitting lid or canopy is highly recommended to secure the aquarium. Ensuring there are plenty of hiding spaces like caves and driftwood will also reduce stress and lower the likelihood of jumping. Floating plants can provide additional security and cover.
Reproduction
Oviparous
Breeding the Blue Acara is relatively easy and frequently occurs in captivity. They are open substrate spawners that typically choose a flat rock, slate, or broad leaf to deposit their eggs. Both parents exhibit exemplary parental care, guarding the eggs and aggressively defending the fry. The eggs hatch in about 2 to 3 days, and the parents will move the fry to pre-dug pits until they are free-swimming.
Compatibility & tankmates
Suitable tank mates include deep-bodied characins, larger tetras, robust catfish like Loricariids, and other peaceful, medium-sized cichlids. Very small fish or shrimp should be avoided, as they will likely be seen as prey and swallowed. During breeding, they will become highly protective, so keeping them with active, fast-swimming companions is best. Avoid housing them with highly aggressive cichlids that could bully them.
Tank level
Middle/Bottom
This species is primarily benthopelagic, meaning it spends most of its time in the middle and bottom layers of the aquarium. They enjoy exploring sandy substrates and searching for food near the tank floor. Providing caves, driftwood, and low-lying vegetation helps them feel secure in their preferred swimming zone. They will occasionally swim to the upper levels, especially during feeding times.

Window to the official scientific data of the species

Data synced on: 06/15/2026

Scientific Parameters & Models

Trophic level
3.3 ± 0.4 se
Resilience
High (less than 15 months)
Phylogenetic uniqueness (PD50)
0.5039
Bayesian Length-Weight
a = 0.03311, b = 3.07
VulnerabilityLow vulnerability (10 / 100)

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

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Last updated: 06/30/2026
Blue Acara (Andinoacara pulcher) Care Guide & Tank Setup | Atlarium