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Playayacu Dwarf Cichlid

Apistogramma playayacu

This rare dwarf cichlid from Ecuador features striking metallic blue markings in males. It requires extremely soft, acidic blackwater and a varied diet of live or frozen foods to thrive.

Taxonomy
Class:Actinopteri
Order:Perciformes
Family:Cichlidae
Subfamily:Cichlinae
Genus:Apistogramma
Species:Apistogramma playayacu

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Water Temperature

23 - 28 °C

pH Value

5.5 - 7

Water type

Freshwater

Tank level

Bottom

Adult size

6 cm

Minimum tank volume

>= 70 L

Minimum group

>= 2

GH

1 - 8 dGH

KH

0 - 4 dKH

TDS

15 - 160 ppm

Conductivity

23 - 250 uS/cm

Species description

Geographical Origin and Habitat: This species is native to the Rio Napo basin, specifically in the Playayacu area within the Orellana province of Ecuador, South America. It inhabits small forest streams (igarapés), swamps, and flooded areas characterized by extremely soft, acidic blackwater, with substrates covered in leaf litter and fallen branches.
Taxonomy and Morphology: Belongs to the family Cichlidae, subfamily Geophaginae, genus Apistogramma. It is a dwarf cichlid where males reach a maximum length of about 6-7 cm (2.5 inches), while females remain smaller at 4-5 cm (1.8 inches). It features an elongated body, slightly pointed snout, and specialized fin shapes that vary significantly by sex.
Social Behavior: Shows a territorial and haremic polygamous behavior, where a dominant male controls a territory hosting several females, each defending her own micro-cave. They are peaceful toward tankmates of other families, but males exhibit strong intraspecific aggression to establish territorial hierarchy.
Coloration and Sexual Dimorphism: Sexual dimorphism is highly pronounced. Males exhibit a spectacular color pattern with metallic blue-green reflections, yellow shades on the throat, and pointed dorsal and anal fins. Females are yellow or grayish with a black lateral stripe, which turns into a bright lemon yellow with intense black spots during breeding to communicate with fry.

Care, breeding and tankmates

Aquarium Setup: Requires a species-only or community aquarium of at least 80 liters (20 gallons) for a pair or small harem. The setup must include a fine, dark sandy substrate, plenty of driftwood and roots to establish visual barriers and hiding places, and coconut shells or small clay pots for spawning sites. Adding oak or Catappa leaves is highly recommended to release beneficial tannins.
Diet and Feeding: A carnivorous predator feeding in nature on small benthic invertebrates, insect larvae, and micro-crustaceans. In the aquarium, transitioning them to dry foods can be challenging; they prefer live or frozen foods such as brine shrimp, daphnia, mysis, and bloodworms. A high-quality, varied diet is essential.
Water Quality: Extremely sensitive to water quality. Demands soft, acidic blackwater conditions: pH between 5.0 and 6.5, general hardness (GH) below 5 dGH, and temperature between 23°C and 27°C (73°F - 81°F). Keep nitrates near zero through gentle peat filtration and frequent partial water changes using reconstituted reverse osmosis water.
Compatibility and Cohabitation: Can be housed with small, peaceful characins like neon or cardinal tetras, which act as dither fish. Also compatible with small loricariids or corydoras (though corydoras may face territorial aggression during spawning as they do not respect territory borders).
Aquarium Breeding: Cave breeders. The female deposits eggs on the ceiling of a cave and assumes sole responsibility for their care, driving even the male away. The male guards the outer perimeter. Eggs hatch in 48-72 hours, and the fry must be fed newly hatched brine shrimp nauplii once their yolk sac is absorbed.
Risks and Diseases: Highly susceptible to fungal and bacterial infections if water parameters are suboptimal or organic pollutants build up. Prone to Hole-in-the-Head disease (Hexamitiasis) and suffers from sudden pH or hardness swings. Quarantine is strongly advised.

Geographic Origin and Distribution

This species is native to the Rio Napo basin, specifically in the Playayacu area within the Orellana province of Ecuador, South America. It inhabits small forest streams (igarapés), swamps, and flooded areas characterized by extremely soft, acidic blackwater, with substrates covered in leaf litter and fallen branches.

Origin

Extra-Amazon South America

Fish profile

Temperament
Territorial
Overall, they exhibit a peaceful demeanor towards other species, but they are known to be territorial among their own kind. During the breeding season, both sexes become fiercely protective of their spawning sites and fry, potentially showing aggression to any intruders. Outside of breeding, they are somewhat shy and require a complex environment with plenty of hiding spaces to feel secure. Creating distinct visual barriers helps manage their territorial nature.
Diet
Carnivore
In their natural habitat, they are micro-predators that sift through the substrate for small invertebrates, insect larvae, and zooplankton. In captivity, they should be offered a varied and high-quality diet consisting of sinking micro-pellets and flakes. Supplementing their diet regularly with live or frozen foods like daphnia, baby brine shrimp, and bloodworms will promote optimal health and vibrant coloration. Variety is key to preventing nutritional deficiencies.
Sex ratio
Harem
In a suitably sized aquarium, they are best maintained in a harem configuration consisting of one dominant male and several females. If the tank is on the smaller side, maintaining a single compatible pair is the safest approach to minimize intraspecific aggression. Keeping multiple males usually requires a very large footprint with complex hardscape to break lines of sight and establish distinct territories. Proper sex ratios are vital for a peaceful tank.
Feeding frequency
Twice daily
It is highly recommended to feed them small portions once or twice daily to maintain their metabolism and overall well-being. Care must be taken to only offer an amount they can completely consume within a couple of minutes to avoid fouling the water. Overfeeding is a common mistake that can lead to severe water quality issues. Fasting the fish for one day per week can also help clear their digestive tract.
Bioload
This species has a relatively low bioload compared to larger cichlids, making it suitable for appropriately sized setups. However, they are highly sensitive to deteriorating water conditions and elevated nitrates. Maintaining pristine water quality through adequate filtration and regular water changes is absolutely crucial for their long-term health. A heavily planted tank can also help absorb excess nutrients and keep the environment stable.
Flow
Strong
Originating from slow-moving streams, backwaters, and sluggish tributaries, they strongly prefer gentle water flow in the aquarium. Strong currents will cause them undue stress and force them to expend unnecessary energy just to maintain their position. Filtration should be baffled if necessary to provide a calm environment, particularly near the substrate where they spend most of their time. Mimicking this natural calm flow is essential for their comfort.
Jump risk
No
Reproduction
Oviparous
They are typical cave spawners, utilizing secluded crevices, leaf litter, or natural hollows to lay their eggs. The female assumes the primary responsibility of guarding the eggs and the subsequent fry, often becoming highly reclusive. The male's role involves defending a larger peripheral territory against any perceived threats. Providing plenty of hiding spots like coconut caves, PVC pipes, and dense vegetation is critical for successful breeding.
Compatibility & tankmates
Verify
They are best kept in a species-specific aquarium or a peaceful community tank with small, non-aggressive dither fish like tetras or rasboras. Fast-swimming or boisterous tank mates should be avoided as they will easily outcompete this species for food and induce stress. Bottom-dwelling species such as Corydoras might face territorial disputes, especially if breeding behaviors commence. Careful selection of tank mates is necessary to ensure a harmonious environment.
Tank level
Bottom
These fish primarily inhabit the lower third of the water column, spending the vast majority of their day navigating the substrate. They are often seen foraging among leaf litter, driftwood, and plant roots in search of food. They rarely venture into the upper levels of the aquarium unless enticed by feeding or if they lack sufficient cover below. A well-structured bottom layout is highly appreciated.

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
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.02399, b = 3.01
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