Electric blue acara

Water parameters

Tolerated range for this species. Aim for the middle of each band rather than the extremes.

Tank and habitat

Substrate: fine.

Behavior

Plant interaction: may nibble soft.

Feeding

Carnivorous-leaning omnivore. Quality cichlid pellets as a staple, supplemented with frozen bloodworm, frozen brine shrimp, frozen mysis, frozen krill, and occasional live food. Blanched vegetables (spinach, peas, zucchini) accepted but not essential. The species is not a fussy eater; an active foraging fish that picks at substrate, decor, and any sinking food. Feed twice daily. Sinking pellets work better than floating ones because the fish prefers feeding in the lower to middle water column. A varied diet with regular frozen content maintains the iridescent blue coloration that is the entire reason for keeping the variety; pellet-only diets produce noticeably duller fish over time.

Compatibility

• The most peaceful medium-sized South American cichlid in the hobby. The selective breeding for color also bred out much of the territorial aggression of wild blue acara, making the electric blue suitable for community tanks that would be wrecked by a similar-sized wild Andinoacara
• Good community partners: medium-to-large tetras (bleeding hearts, congo tetras, lemon tetras), peaceful barbs, larger rasboras, peaceful gouramis, corydoras (yes, these stay safe with EBAs), bristlenose pleco, and other peaceful South American cichlids (severum, angelfish)
• Avoid very small fish that fit in the EBA mouth (neon tetras, embers, endlers, chili rasboras), which are eaten. Avoid known aggressive cichlids (convicts, jack dempseys, wild-type blue acara) that will dominate the comparatively gentle EBA
• Substrate digging means rooted plants get uprooted; attach plants to hardscape (anubias, java fern, bucephalandra on driftwood) or use planted pots if a planted aquascape is wanted
• Pairs form for breeding and become moderately territorial during spawning, but the aggression is mild compared to convicts or firemouths. In a tank of 200+ litres with cover, other fish can coexist
• Eats dwarf shrimp and small snails; not appropriate for invertebrate-display tanks

Origin and habitat

A selectively-bred or hybrid colour morph of the blue acara, Andinoacara pulcher. The origin of the electric blue form is genuinely debated, and no definitive DNA work has been published. The most widely cited account is that Asian fish farms produced the strain through forced hybridisation between A. pulcher eggs and milt from male electric blue rams (Mikrogeophagus ramirezi), then line-bred the offspring to stabilise the recessive electric blue trait. An alternative theory holds that the colour morph is a pure intra-species selective breed of A. pulcher, but breeding experiments cited in the hobby literature suggest the trait does not behave like a single simple recessive mutation, which weakens the intra-species explanation. A 2026 source claims that recent genetic studies confirm the variety as the same species as wild blue acara, but the citation for that study is not given. Whatever the origin, the morph breeds true when paired with itself, all fry show the electric blue colouration. Crossed with a standard wild-type A. pulcher, offspring resemble the wild form but carry the electric blue gene as a recessive trait. The wild blue acara, Andinoacara pulcher, was described by Theodore Gill in 1858 as Cichlasoma pulchrum from Trinidad. The Andinoacara genus was erected by Musilová, Říčan, and Novák in 2009 (Journal of Zoological Systematics and Evolutionary Research 47(3):209-304), separating these species from the wastebasket genus Aequidens; the genus also contains the green terror (A. rivulatus), the platinum acara (A. latifrons), and several less common species. The genus name Andinoacara combines a reference to the Andes mountain chain with acará, the Tupí-Guaraní word for cichlid; the species epithet pulcher is Latin for 'beautiful'. Wild A. pulcher is native to Trinidad and Tobago and parts of Venezuela; the wild fish is olive-green with eight obscure transverse bands and bright bluish-green cheek lines, and is one of the more adaptable Andinoacara species in terms of habitat tolerance (still water through to flowing streams). Records show max 16 cm TL for wild A. pulcher; the captive-bred electric blue typically reaches 13 to 15 cm. Family Cichlidae, tribe Cichlasomatini. Three anal spines and the absence of a first-branchial-arch lobule are the diagnostic features distinguishing Andinoacara from Geophagus. The selective breeding for the electric blue colour appears to have reduced aggression compared to the wild form: other sources note that much of the wild blue acara's territorial aggression has been bred out of the electric blue strain, which is why it has become one of the few medium-sized cichlids workable in a peaceful community tank. IUCN classifies the wild blue acara as Least Concern. Substrate digger that uproots rooted plants and disturbs aquascapes; attach plants to hardscape or use pots if a planted setup is wanted. Introduced wild populations exist in Australia (Brisbane creeks, Leslie Dam, Hazelwood power-station cooling ponds) from ornamental-trade releases.

Breeding

Substrate spawner with biparental care, following the typical Andinoacara/Acara pattern. A bonded pair selects a clean flat surface (a stone slab, a piece of flat driftwood, a slate tile, or even the tank glass) and the female deposits 150 to 300 eggs in rows; the male fertilises them and both parents then guard, fan, and clean the eggs, removing any that fungus. Eggs hatch in three to four days at typical aquarium temperature. Both parents transfer the wrigglers to a pit dug in the substrate and continue guarding them; the fry become free-swimming about four to five days after hatching, at which point they begin taking baby brine shrimp, microworms, and finely crushed flake. Parental care typically lasts three to four weeks. Young pairs commonly eat their first one or two batches as inexperience; later spawns succeed reliably. The electric blue coloration is visible in fry from a young age. Aggression during breeding is moderate; the pair will defend the spawning area but is much less destructive to tankmates than convict cichlids or other small Central American cichlids. A large tank (over 200 litres) with cover allows other species to retreat from the spawning territory.

Common problems

Mass production at varying quality control levels means individual fish quality is inconsistent: buy from a reputable source if possible (some breeders are well-established and produce robust fish; others ship stressed undersized juveniles with poor colour development). The selectively-bred origin raises the same kind of concerns that DGIV raises for dwarf gouramis, but so far electric blue acaras have not shown a comparable systemic disease problem; some breeders note slightly shorter average lifespans (six to eight years) compared to wild blue acaras (ten years plus), and occasional reports of Hexamita (hole-in-the-head disease) appear in poorly maintained or imported fish. Hole-in-the-head presents as pits and lesions along the head and lateral line; treat with metronidazole and address underlying water-quality and diet causes. Substrate digging is a constant: rooted plants get uprooted, fine substrates get rearranged, and small aquascape elements get moved around. Sand or fine gravel is more tolerant of this behaviour than coarse gravel that the fish struggles to move. Territorial aggression during breeding is mild but real; smaller community fish need places to retreat. The species is otherwise hardy and tolerant of a wide range of water conditions (pH 6.0 to 8.0, GH 3 to 20 dGH).

Bioload

Further reading

• Stocking ideas by tank size