Blue Acara (Aequidens pulcher)

Taxonomy and identification

The supplied name is Aequidens pulcher. The species is widely known in the aquarium trade as the blue acara and is often treated in modern references as Andinoacara pulcher. It has an oval, moderately deep body, a pointed dorsal fin and blue to turquoise iridescent markings over a silver, grey or yellowish base. Dark markings may appear along the body and near the gill cover. Identification from the photograph remains provisional because similar acara cichlids can share this general pattern.

Natural distribution and habitat

Blue acara are associated with freshwater habitats in northern South America, including reported areas of Colombia and Venezuela. They occur in relatively slow-moving streams, rivers, ponds and other warm waters with cover provided by vegetation, roots, rocks and submerged debris. Aquarium specimens should be kept in clean, well-oxygenated water with moderate flow rather than strong current.

Behavior

This is an active, intelligent cichlid that commonly occupies the lower and middle levels of the aquarium. Adults defend a territory, particularly when paired or spawning. Outside breeding, aggression is often manageable, but individual temperament varies. A bonded pair may harass timid fish or intruders, and territorial disputes can become serious in a small aquarium.

Aquarium size and layout

A pair should have at least about 200 litres, with a larger footprint preferred; approximately 240 litres or more provides better room for territories and tank mates. Use sand or smooth fine gravel, robust plants attached to wood or rocks, and several caves or flat spawning surfaces. Leave open swimming space and arrange décor to break lines of sight. Secure plants and décor because these cichlids may dig.

Water parameters

Maintain stable water rather than pursuing an exact number. A temperature of 23-28 °C, pH 6.0-8.0 and moderate hardness are generally suitable. Efficient filtration, good oxygenation and regular partial water changes are important because cichlids respond poorly to accumulated waste and sudden chemistry changes. Acclimate new fish gradually and monitor ammonia and nitrite, which should remain undetectable.

Diet

Blue acara are omnivorous. Offer a quality cichlid pellet or granule as the staple, supplemented with frozen or live foods such as bloodworm, brine shrimp, mysis or other suitably sized aquatic foods. Some vegetable matter can be supplied through spirulina-based foods or formulated pellets. Feed small portions once or twice daily and remove uneaten food. Avoid relying on fatty live foods or mammalian meat.

Compatibility

Choose peaceful to moderately assertive tank mates of similar size that tolerate warm, slightly acidic to neutral or mildly alkaline water. Suitable communities may include robust tetras, larger peaceful barbs, medium-sized peaceful catfish and other compatible South American species, provided the aquarium is large enough. Avoid very small fish that may be eaten, fin-nipping species and highly aggressive cichlids. During spawning, separation may be necessary.

Breeding

Blue acara are substrate-spawning cichlids that commonly form a pair bond. Provide a clean flat stone, slate or another firm surface, along with nearby shelter. The pair typically cleans the site, lays adhesive eggs and jointly guards the clutch and free-swimming fry. Parents may fan and defend the eggs, then herd the fry after hatching. Feed newly free-swimming fry suitably fine foods, such as powdered fry food or newly hatched brine shrimp. Watch the pair closely because inexperienced parents may eat or lose an early brood, and breeding aggression can injure other fish.