Peacock Cichlids at a Glance
Peacock cichlids offer some of the most intense coloration in freshwater aquatics, but they need spacious, well-filtered tanks and careful tankmate selection.
Peacock Color Intensity by Species
Peacock Species Comparison
| Species | Max Size | Min Tank | pH | Temperament | Color |
|---|---|---|---|---|---|
| A. stuartgranti (Blue Peacock) | 6" | 55 gal | 7.8-8.6 | Mildly aggressive | Blue/Teal |
| A. jacobfreibergi (Eureka Red) | 6" | 55 gal | 7.8-8.6 | Semi-aggressive | Red/Orange |
| A. baenschi (Yellow/OB Peacock) | 5" | 55 gal | 7.8-8.6 | Semi-aggressive | Yellow/OB |
| A. nyassae (Ruby Red Peacock) | 5" | 55 gal | 7.8-8.6 | Mildly aggressive | Ruby Red |
| A. hueseri (White Peacock) | 5" | 55 gal | 7.8-8.6 | Peaceful | White/Pink |
Peacock Cichlid Care Guide
| Provide 55+ gallons with plenty of open swimming space | |
| Maintain hard, alkaline water (pH 7.8-8.6, KH 10-20) | |
| Feed high-quality cichlid pellets + frozen foods for color | |
| Use 1 male per tank or 1 male + multiple females to reduce aggression | |
| Provide rockwork caves and structures for territory boundaries | |
| House with mbuna cichlids — they're too aggressive for peacocks | |
| Keep two dominant males in the same tank without ample space | |
| Use soft, acidic water — it stresses Malawi cichlids | |
| Overcrowd — peacocks need swimming room and defined territories |
The 'OB' (Orange Blotch) pattern in peacock cichlids is a sex-linked color morph — only females display the OB pattern in A. baenschi, while males show solid yellow.
Peacocks are mouthbrooders — females hold eggs/fry in their mouths for 21-28 days. Provide plenty of hiding spots if breeding is the goal.
Peacock cichlids (genus Aulonocara) are among the most colorful freshwater fish available in the hobby, rivaling many marine fish in their iridescent blues, golds, and reds. Unlike many African cichlids, peacocks are relatively peaceful for their family -- males display intensely but rarely fight to the death, and with appropriate ratios and tank size, they're manageable in a community African cichlid tank. Their care requirements are specific but not difficult once the alkaline, hard water parameters are understood.
| Parameter | Lake Malawi Target | Consequence of Wrong Value |
|---|---|---|
| pH | 7.8–8.5 | Below 7.5: washed-out color, immune suppression |
| Hardness (GH) | 10–20 dGH | Soft water: stress, shortened lifespan |
| Temperature | 76–82°F | Stable temp needed; avoid swings |
| Nitrate | <20 ppm ideally | Above 40 ppm: stress; susceptibility to disease |
| Sand substrate | Fine aragonite or coral sand | Essential — peacocks sift sand to forage constantly |
Species Overview
Over 20 Aulonocara species are described, though many are sold as color variants rather than distinct species. Common in trade: A. jacobfreibergi (Fairy cichlid, available in several color forms), A. hansbaenschi (Red shoulder peacock), A. stuartgranti (Flametail and other named forms), and OB (orange blotch) variants that result from hybrid crosses. Wild-caught peacocks tend to have more intense, species-typical coloration; tank-bred fish are widely available and easier to source.
Tank Size and Setup
Peacocks are active swimmers with moderate aggression -- minimum tank for a peacock species display is 55 gallons, with 75-125 gallons providing significantly better results. Larger tanks buffer the dilute aggression of dominant males and allow proper female-to-male ratios (2-3 females per male in multi-male setups). A sandy substrate is essential -- peacocks feed by sifting sand for invertebrates in the wild and will spend hours doing this behavior in captivity. Crushed coral or aragonite sand raises pH naturally, which is ideal for the hard, alkaline Lake Malawi conditions these fish require.
Water Parameters
Lake Malawi parameters: pH 7.8-8.5; hardness 10-20 dGH; temperature 76-82F; ammonia and nitrite at 0 ppm; nitrate under 20 ppm ideally (under 40 ppm is tolerable). Maintaining elevated pH and hardness is critical -- peacocks kept in soft, acidic water develop washed-out coloration, immune suppression, and shorter lifespans. Crushed coral substrate and/or aragonite in the filter passively maintain alkalinity; pH-up products are less reliable. High-quality filtration is essential; African cichlid tanks are heavily stocked and biologically loaded.
Diet
Peacocks are invertebrate hunters -- they should be fed foods that reflect this: high-protein pellets and granules formulated for carnivorous cichlids (Hikari, NLS), frozen krill, mysis shrimp, and cyclops. Avoid spirulina-heavy or algae-dominant foods -- peacocks are not herbivores and these foods don't match their metabolic profile. Feed 2x daily; remove uneaten food promptly. Overfeeding is the most common water quality mistake in cichlid tanks.
Compatibility
In a species tank, a harem of 1 male: 3+ females is the typical setup. In a community Lake Malawi tank: peacocks can be mixed with smaller, less aggressive haplochromine cichlids (other Aulonocara, peacock-compatible Haps like Copadichromis). Do not mix with mbuna (rock-dwellers) -- mbuna are more aggressive, compete for the same males' territories, and will hybridize with some Aulonocara species. Hybrid peacocks are common in the trade; if maintaining pure species lines matters, source fish from reputable cichlid specialty breeders.
Sources: Cichlid Room Companion species profiles; Ad Konings "Cichlids from Lake Malawi" (academic reference); Seriously Fish Aulonocara profiles; American Cichlid Association care standards.