---
type: species
title: "OB Peacock Cichlid Care Guide: Colors, Diet, and Tank Mates"
slug: "ob-peacock-cichlid"
category: "freshwater"
scientificName: "Aulonocara spp. (hybrid)"
subcategory: "Lake Malawi Peacock"
lastUpdated: "2026-04-24"
readingTime: 10
url: https://www.fishstores.org/species/ob-peacock-cichlid
---

# OB Peacock Cichlid Care Guide: Colors, Diet, and Tank Mates

*Aulonocara spp. (hybrid)*

Master OB Peacock Cichlid care. Learn about their unique Orange Blotch patterns, ideal water parameters (pH 7.8-8.6), and how to manage hybrid aggression.

## Species Overview

The OB Peacock Cichlid (*Aulonocara* spp. hybrid) is one of the most visually striking African cichlids you can buy at a typical local fish store, and it owes its existence entirely to human intervention. "OB" stands for Orange Blotch — an irregular calico-style patterning of orange, black, and blue patches scattered across an otherwise peacock-blue body. The pattern is genetic, but it does not occur in any wild *Aulonocara* species. Every OB Peacock you have ever seen was descended from a deliberate cross between a Mbuna female (most often *Labeotropheus fuelleborni*) and a male Peacock cichlid, and the resulting hybrid line has been refined over decades of selective breeding into the fish you see in stores today.

Native ancestry traces to the rocky and sandy intermediate zones of Lake Malawi, where wild *Aulonocara* species (the "peacocks") sift sand for invertebrates while Mbuna graze the algae-covered rocks above them. The OB Peacock combines the body shape and feeding behavior of the peacock side with the Orange Blotch color gene from the Mbuna side. The result is a fish that requires the same hard, alkaline water as both parent groups, but whose temperament and best tank-mate selection sit somewhere in between — and that "in between" is exactly what makes them tricky to stock correctly.

| Field       | Value                   |
| ----------- | ----------------------- |
| Adult size  | 5-6 in (13-15 cm)       |
| Lifespan    | 8-10 years              |
| Min tank    | 75 gallons (harem)      |
| Temperament | Semi-aggressive         |
| Difficulty  | Intermediate            |
| Diet        | Carnivore (insectivore) |

> **Orange Blotch is a hybrid trait — cross of Aulonocara x Mbuna**
>
> Pure wild *Aulonocara* species do not carry the Orange Blotch gene. Every OB Peacock on the market descends from a cross between a peacock male and an Mbuna female, typically *Labeotropheus fuelleborni*. The hybrid line has been bred for generations, but the underlying genetics still shuffle on every spawn — which is why no two OB Peacocks ever look exactly alike, and why occasional fry pop up with traits closer to one parent group than the other.

### The "Orange Blotch" Genetic Hybrid (Aulonocara x Mbuna)

The OB pattern is sex-linked and behaves more like calico genetics in cats than the simple color genes that govern most cichlid morphs. The original cross paired a female Mbuna carrying the OB gene with a male peacock, and the resulting offspring inherited the patterning but largely kept the peacock body shape and feeding behavior. Subsequent generations have been line-bred and back-crossed to enhance color contrast and pattern density, and most modern lines breed reasonably true to type. Modern variants include the OB Strawberry Peacock, OB Sunshine Peacock, and OB Red Shoulder Peacock, each emphasizing slightly different background colors beneath the blotched pattern.

For practical purposes, the genetic origin matters in two ways: hybrid fish do not breed reliably true (expect significant variation in fry), and reputable wild-strain *Aulonocara* breeders consider OB lines off-limits for any purist breeding project. If you want a fish that looks spectacular and is hardy at the LFS, the OB Peacock is a strong choice. If you want to breed wild-type *Aulonocara nyassae* or *A. stuartgranti*, an OB Peacock will contaminate your line in a single generation.

### Size and Lifespan (5-6 inches; 8-10 years)

Adult OB Peacocks reach 5 to 6 inches at full size, with males running larger and more robust than females. They grow steadily for the first 18 to 24 months and reach reproductive maturity around 12 to 14 months. With proper care — stable parameters, an appropriate diet, weekly water changes, and minimal aggression-driven stress — they routinely live 8 to 10 years in the home aquarium. Fish kept in marginal conditions or fed a poor diet often die in years 3 to 5 from cumulative organ damage related to chronic Malawi Bloat episodes or unstable pH.

### Sexual Dimorphism: Identifying Males vs. Females

Sexing OB Peacocks is harder than sexing wild *Aulonocara* because the OB pattern can mask the underlying sexual coloration. In standard peacock species, dominant males develop intense iridescent blue, red, or yellow coloration while females stay drab gray-tan. In OB lines, both sexes carry the orange blotching, so color saturation is a less reliable sex indicator.

The most consistent markers are body shape (males are deeper-bodied and develop slightly elongated dorsal and anal fin extensions), egg spots on the anal fin (males display bright yellow-orange spots used in mouthbrooding courtship; females either lack them or show much fainter ones), and overall size at maturity (males average 1 to 1.5 inches larger than females). Juvenile sexing is unreliable — wait until fish are 4 inches before trying to confirm sex.

## Water Parameters & Tank Requirements

OB Peacocks share parameter requirements with both parent groups, which means hard, alkaline, mineral-rich water is non-negotiable.

> **Lake Malawi water — hard alkaline pH 7.8-8.6**
>
> *Aulonocara* and Mbuna both evolved in water that is the freshwater equivalent of mild seawater — pH 7.8 to 8.6, hardness 10 to 25 dGH, KH 10 to 20 dKH, and a high mineral content from limestone-rich shorelines. This is biology, not preference. Soft, neutral water that suits tetras and rams will slowly stress and kill an OB Peacock over months. Use aragonite sand, crushed coral, and African cichlid salt mix to lock the pH and hardness into the correct range before adding fish.

### Minimum Tank Size: Why 75 Gallons is the Baseline for a Harem

A 55-gallon tank is the absolute minimum for a single male OB Peacock kept with one or two females, but that footprint is too cramped for the harem dynamic these fish prefer. The practical baseline for a 1-male-to-3-or-4-female harem is a 75-gallon tank (48 inches long), which gives the male enough territory to display and the females enough escape routes when his attention turns aggressive. For mixed peacock or peacock-Hap communities, jump to a 125-gallon (72 inches long).

Footprint matters more than total volume. A 75-gallon long tank dramatically outperforms a 75-gallon tall in cichlid keeping because the fish use horizontal territory, not vertical. See the [aquarium dimensions reference](/guides/aquarium-dimensions) for the full footprint comparison.

### Filtration: Over-filtering for High Bio-loads

Peacocks eat well and produce a heavy bioload to match. Over-filter rather than under-filter. A canister rated for 1.5 to 2 times tank volume is the standard recommendation, or run two large hang-on-back filters in parallel. Aim for total turnover of 6 to 10 times the tank volume per hour. Direct outputs to create moderate flow along the rock and sand surfaces, mimicking the wave-driven water movement of the lake's intermediate zones.

Weekly water changes of 25 to 30 percent are mandatory. The high bioload of a packed cichlid tank means nitrate climbs fast, and chronic high nitrate is a leading trigger for the immune-suppressed bloat that wipes out tanks in a week.

### OB Peacock Cichlid Water Parameters

| Parameter         | Target            | Notes                                      |
| ----------------- | ----------------- | ------------------------------------------ |
| Temperature       | 76-82°F (24-28°C) | Stable matters more than exact             |
| pH                | 7.8-8.6           | Buffer with aragonite or crushed coral     |
| Hardness (GH)     | 10-25 dGH         | Hard, mineral-rich water                   |
| Alkalinity (KH)   | 10-20 dKH         | Critical for pH stability                  |
| Ammonia / Nitrite | 0 ppm             | Anything above zero is toxic               |
| Nitrate           | \<20 ppm          | Weekly 25-30% water changes                |
| Substrate         | Aragonite sand    | Buffers pH; safe for sand-sifting behavior |

## Diet & Feeding

This is where OB Peacock care diverges from Mbuna care, and where keepers who treat them like a Red Zebra get into trouble.

### High-Protein Pellets vs. Spirulina Balance

OB Peacocks inherit the carnivore-leaning gut of their *Aulonocara* parent, which evolved to sift invertebrates from the sand. They tolerate and benefit from a higher-protein diet than pure Mbuna can handle — but the Mbuna genetics in their lineage means their digestive system is still less robust than a true insectivore peacock. The safe approach is a balanced diet built around a quality cichlid pellet with moderate protein (35 to 45 percent) and supplemental spirulina, with occasional frozen treats.

Build the daily diet around a pellet like New Life Spectrum Cichlid Formula, Hikari Cichlid Bio-Gold, or Northfin Cichlid. Feed twice a day in small portions the fish can clear in two minutes. Rotate spirulina flakes or pellets in once or twice a week to add fiber and keep the gut flora balanced.

### Avoiding "Malawi Bloat" through Proper Fiber

Malawi Bloat is the species-specific killer for any Lake Malawi cichlid. It is caused by an overgrowth of pathogenic gut bacteria, usually triggered by an inappropriate diet (too much protein, not enough fiber), poor water quality, or stress. Symptoms include a swollen, distended abdomen, loss of appetite, listless hovering near the substrate, stringy white feces, and rapid breathing. Once symptoms are obvious, treatment is difficult and mortality is high.

Prevention is dietary. Even though OB Peacocks tolerate more protein than pure Mbuna, feeding bloodworms or beef heart as a regular staple still triggers bloat in a meaningful percentage of fish. Keep protein moderate, include fiber-heavy spirulina or vegetable supplements weekly, and skip beef heart entirely.

### Live and Frozen Treats (Mysis Shrimp and Brine Shrimp)

Frozen mysis shrimp and brine shrimp are excellent twice-weekly treats. They are high-protein but low-fat compared to bloodworms, easy to digest, and rich in carotenoids that enhance the orange blotching. Avoid bloodworms and tubifex as regular foods — both have been linked to Malawi Bloat outbreaks even in protein-tolerant peacocks. Live brine shrimp once a week is fine if you have a clean source.

## Tank Mates & Compatibility

The hybrid origin of OB Peacocks makes their stocking trickier than either parent group, because their temperament can lean toward either side depending on the individual fish.

> **Hybrid origin = unpredictable temperament**
>
> Because OB Peacocks carry genetics from both peacock and Mbuna lineages, individual temperament varies significantly. Some OB Peacocks behave like classic peacocks — calm, sand-sifting, peaceful with appropriately matched tank mates. Others inherit the Mbuna aggression and turn into bullies that terrorize the tank. There is no way to predict which type you have until the fish matures. Stock with this variability in mind: leave room to remove a problem male, and never assume an OB Peacock will fit a "peaceful peacock community" classification just because it is sold as a peacock.

### Best Companions: Other Peacock and Flame-Tail Cichlids

In a properly sized tank (75 gallons or larger), OB Peacocks pair well with other *Aulonocara* species and with peaceful Haplochromines that tolerate the same parameters. Strawberry Peacocks, Sunshine Peacocks (*Aulonocara baenschi*), German Red Peacocks, and Flame-Tail Peacocks all work as long as you avoid stocking two males of similar coloration to your OB. Hap species like *Copadichromis borleyi* (Red-Fin Borleyi) and *Sciaenochromis fryeri* (Electric Blue Hap) are also compatible in larger tanks and add visual variety.

The harem ratio of 1 male to 3 or 4 females per species is the standard stocking strategy. Heavy stocking with multiple species spreads the dominant male's aggression across many targets and prevents any single fish from being beaten down.

### Managing Aggression: The "Overstocking" Strategy

Like Mbuna, peacock tanks benefit from controlled overstocking. A 125-gallon tank with 15 to 20 mixed peacocks and Haps is often more peaceful than the same tank with 6 fish, because the dominant male has too many targets to focus on any single fish. Pair this with dense rockwork that breaks sightlines, plenty of caves for subordinate fish to retreat into, and a solid female-to-male ratio across all species in the tank.

This strategy only works with robust filtration and weekly water changes. Heavy stocking in marginal water quality is the formula for a Malawi Bloat outbreak.

### Species to Avoid: Why Mbuna and South Americans Don't Mix

Skip the Mbuna pairings even though OB Peacocks share genetics with them. Mbuna are more aggressive and faster eaters, and they will outcompete OB Peacocks at feeding time. Worse, Mbuna males may try to breed with female OB Peacocks, producing further hybrid generations. The peacocks that work alongside OBs in shared tanks are other *Aulonocara*, not *Maylandia* or *Pseudotropheus*.

The [Red Zebra Cichlid](/species/red-zebra-cichlid) is a classic Mbuna that is sometimes proposed as a tank mate but in practice causes the problems above. Larger Tanganyikan species like the [Frontosa Cichlid](/species/frontosa-cichlid) need cooler, deeper-water setups and a calmer tank dynamic that does not mesh with the constant peacock activity. Avoid all South and Central American cichlids — the parameter mismatch alone (soft, neutral water vs. hard, alkaline) makes any mix doomed long-term.

## Breeding the OB Peacock

Mouthbrooding cichlids breed readily in the home aquarium. The bigger problem is what to do with the fry, especially when the parents are themselves hybrids.

> **Harem dynamic — 1 male to 3-4 females for natural breeding**
>
> OB Peacocks breed best in a harem configuration of one dominant male to three or four females, housed in a 75-gallon-plus tank with dense rockwork. The female-heavy ratio prevents the male from harassing any single female to exhaustion — his courtship attention spreads across the group. A single male with one or two females typically results in one breeding-receptive female being chased to death within months.

### Mouthbrooding Behavior and Gestation

OB Peacocks are maternal mouthbrooders. The male displays in front of a chosen female, leading her to a spawning pit he has cleared in the sand. She drops a few eggs at a time and immediately picks them up in her mouth. The male flares his anal fin to display his egg spots, the female mistakes them for her own eggs and tries to pick them up, and in doing so triggers the male to release sperm into her mouth, fertilizing the clutch.

The female then carries the eggs in her buccal cavity for 18 to 24 days, during which she stops eating entirely and develops a noticeably distended throat. When the fry are fully developed she releases them in a sheltered cave area. They are immediately free-swimming and can feed on baby brine shrimp, crushed flake, and powdered fry food.

### Setting up a Fry Grow-out Tank

If you want to raise the fry, move the holding female to a separate 10 or 20-gallon release tank a few days before her expected release date. This protects the fry from being eaten by tank mates and gives the female a few days to recover before rejoining the colony. A holding female who is harassed back to spawning condition too quickly will lose body condition fast.

Fry grow at roughly 1 inch per 2 to 3 months under good conditions. Because OB Peacocks are hybrids, expect significant variation in fry coloration — some will show the OB pattern strongly, some will look more like solid-color peacocks, and some may resemble the Mbuna ancestor. Sort and cull (or sell as feeders) fry that do not meet your line standard if you plan to continue breeding.

## Common Health Issues

The two diseases responsible for nearly all OB Peacock losses are both preventable.

### Identifying Ich and Velvet in Blotched Patterns

Ich (*Ichthyophthirius multifiliis*) presents as small white spots scattered across the body and fins. The catch with OB Peacocks is that their natural blotching can include light-colored patches that look superficially similar to ich. The reliable test is whether the spots are raised (ich is, the natural pattern is not) and whether they appear fresh (ich spots increase in number day-over-day). Treat ich with a heat-and-salt protocol (raise to 86°F for 10 days, add aquarium salt at 1 tablespoon per 5 gallons) or a copper-based medication in a quarantine tank.

Velvet (*Oodinium*) presents as a fine gold or rust-colored dust coating on the body, often more visible under a flashlight than under tank lighting. It is more aggressive than ich and requires copper treatment. Both diseases enter the tank on un-quarantined new fish — a 4-week quarantine period for any new arrival eliminates the risk almost entirely.

### Treating Malawi Bloat and Swim Bladder Issues

Malawi Bloat treatment is metronidazole-medicated food, dosed at 100 mg per 10 grams of food for 5 to 7 days. Even with prompt treatment, mortality is high. Swim bladder issues — fish floating sideways or unable to maintain depth — are usually secondary to bloat or to a parameter problem (sudden pH swing, ammonia spike). Check water parameters first, then treat for bloat if the abdomen is distended.

Prevention beats treatment. Feed a diet appropriate for the fish, maintain stable parameters, perform weekly water changes, and quarantine new arrivals. Tanks that follow this protocol rarely see bloat or related complications.

## Where to Buy & What to Look For

OB Peacocks are widely captive-bred and stocked at most stores that carry African cichlids. Sourcing a quality specimen takes a little discrimination but the species is rarely hard to find.

### Assessing Color Intensity and Fin Health at Your LFS

The "Pattern Lottery" is real with OB Peacocks. Because the underlying genetics shuffle each generation, no two fish look identical, and the color contrast between high-quality and mediocre specimens is dramatic. Look for fish with bold, well-defined orange blotches against a deep blue background — not pale, washed-out orange against gray. Avoid fish whose blotching looks muddy or whose blue base color appears faded.

### What to Inspect Before You Buy an OB Peacock

- [ ] Bold, well-defined orange blotches against a saturated blue base color — not pale or washed out
- [ ] Active swimming and sand-sifting behavior, not hiding listlessly in a corner
- [ ] Clear eyes with no cloudiness, swelling, or pop-eye
- [ ] Intact fins with no fraying, white edges, or large tears
- [ ] Flat, normally proportioned abdomen — no bloating or distension
- [ ] Normal feces in the tank (not stringy white, which signals bloat)
- [ ] Alert response when you approach the tank — flares fins or swims to investigate
- [ ] Ask staff to feed the fish while you watch — confirm it actively eats pellets

### The Importance of Quarantining New Arrivals

A 4-week quarantine in a separate 20-gallon tank with sponge filtration and matching water parameters eliminates the majority of disease introductions. Quarantine is not optional for fish entering an established cichlid community — a single ich or velvet outbreak in a fully stocked 125-gallon tank can wipe out months of stocking work in days.

### Acclimation

Drip-acclimate over 60 to 90 minutes. The pH and hardness shock when moving from a typical store tank to a properly buffered cichlid setup is significant, and even a hardy fish needs time to adjust. Test your tank water and the bag water before you start, and if the difference in pH is greater than 0.5 units, lengthen the drip period. See the [acclimation guide](/guides/how-to-acclimate-fish) for the full procedure.

## Quick Reference

- **Tank size:** 75 gallons minimum for a 1M:3-4F harem; 125+ gallons for mixed peacock community
- **Temperature:** 76-82°F (24-28°C)
- **pH:** 7.8-8.6
- **Hardness:** 10-25 dGH, 10-20 dKH
- **Substrate:** Aragonite sand or crushed coral
- **Diet:** Carnivore-leaning omnivore — moderate-protein cichlid pellets, occasional mysis and brine shrimp, weekly spirulina
- **Tankmates:** Other *Aulonocara* peacocks, peaceful Haps, Synodontis catfish
- **Difficulty:** Intermediate — easy parameters to hit but non-negotiable
- **Lifespan:** 8-10 years
- **Watch for:** Malawi Bloat, hybrid temperament variation, washed-out color from poor diet

For broader context on starting a freshwater tank capable of housing an OB Peacock harem, see our [freshwater fish overview](/guides/freshwater-fish).

**Find OB Peacock Cichlids at a local fish store near you** — [Find stores near me](https://www.fishstores.org/near-me)

Inspect peacocks in person before you buy — the color contrast between high-quality and mediocre OB specimens is dramatic, and the difference is far easier to verify face-to-face than from a shipping bag.

## Frequently Asked Questions

### Are OB Peacock Cichlids aggressive?

OB Peacocks are semi-aggressive. While more peaceful than Mbuna, males are territorial, especially during breeding. Use rocks to break lines of sight and consider controlled overstocking to disperse aggression among tank mates.

### What is the minimum tank size for an OB Peacock?

A single male needs at least 55 gallons. However, for a mixed African Cichlid community or a proper harem (1 male to 3-4 females), a 75-gallon or 125-gallon tank is highly recommended to provide enough swimming space and territory.

### Can OB Peacocks live with plants?

Generally, no. They are notorious diggers and prefer high pH levels that many plants dislike. Stick to hardy species like Anubias or Java Fern attached to rocks, or use high-quality silk plants.

### How do I enhance my OB Peacock's color?

Feed a diet rich in carotenoids and astaxanthin. High-quality cichlid pellets and varied frozen foods, combined with clean water and low stress, will make their orange and blue blotches pop.

### Are OB Peacocks natural fish?

No, they are man-made hybrids. They were created by crossing a female Mbuna (usually Labeotropheus fuelleborni) with a male Aulonocara peacock to achieve the unique Orange Blotch mutation not found in wild Peacocks.

---
*Source: [FishStores.org](https://www.fishstores.org/species/ob-peacock-cichlid)*
*Last updated: April 24, 2026*