Sulphurhead Peacock (Aulonocara maylandi)

Overview

The Sulphurhead Peacock is a Lake Malawi peacock cichlid best known for the mature male's blue body and yellow blaze across the head and dorsal line. The accepted scientific spelling used by FishBase and specialist cichlid references is Aulonocara maylandi. Our supplier records and some older aquarium trade material use the spelling Aulonocara maylandii, so this listing keeps that older spelling as source context while using Aulonocara maylandi in the public title and SEO fields.

This is a more refined Malawi cichlid than many rough mbuna, but it is still a territorial African cichlid and should not be treated as a soft-water community fish. It suits keepers who can provide hard, alkaline water, open sand, stable filtration and calm tankmates. The current size options are sale sizes. A small 3-4 cm fish may not show full male colour yet, while larger males can develop the stronger blue body and sulphur-yellow blaze that gives the fish its common name.

Quick Facts

• Accepted scientific name: Aulonocara maylandi
• Supplier spelling to recognise: Aulonocara maylandii
• Natural range: Lake Malawi, especially reef-and-sand border habitat around Eccles/Chimwalani Reef and Luwala/West Reef references
• Adult size: around 12-15 cm depending on sex, age and conditions
• Care level: Moderate Malawi cichlid care
• Temperament: comparatively peaceful for a Malawi cichlid, but males are territorial
• Water: hard, alkaline, warm and stable
• Diet: carnivorous/invertebrate-focused; quality cichlid pellets plus varied frozen foods
• Breeding: female mouthbrooder

Natural Habitat

In the wild, Aulonocara maylandi is a Lake Malawi endemic associated with the border between rocky reef and sand. FishBase lists hard alkaline water, a maximum length around 15 cm, and a natural diet of small sand-dwelling invertebrates. Aquarium Glaser notes that the species is restricted to two south-eastern Lake Malawi reef areas and that the aquarium should represent the transition between rocks and sand. That habitat tells us a lot about how to keep the fish well: not a cluttered aggressive mbuna tank, not a planted soft-water community, but a calmer Malawi setup with open sand, rock boundaries and stable mineral-rich water.

The narrow wild range also matters ethically. This species has been assessed as threatened in the wild, so captive-bred or responsibly sourced fish are strongly preferred. We avoid exaggerated sales language here because the right outcome is not simply a quick purchase; it is a fish going into an aquarium that can support its adult size, diet and social behaviour.

Appearance and Sex Differences

Juveniles and females are usually more subdued, often showing silver, grey or brown tones that help them avoid attention. Mature males are the display fish, with electric blue body colour, dark fin contrast and the yellow sulphur blaze over the head and upper dorsal area. Colour intensity depends on age, sex, diet, social rank, lighting and stress level. A newly arrived fish may look paler than a settled fish, and a young male may need time before the full blaze develops.

The exact source photo for this listing shows the classic adult male look: blue body, darker barring and a yellow head line. The verified source photo is placed first because it is the safest reference for the actual product identity, with the wider gallery behind it.

Aquarium Setup

Use a mature hard-water aquarium with fine sand across much of the base and rockwork arranged along the back and sides. Leave open sand so the fish can browse and sift naturally, and use rock piles to create boundaries without turning the whole tank into a cramped cave maze. The best layout gives a male somewhere to display while still allowing females and subordinate fish to move away.

A 250 litre aquarium is a sensible practical minimum for a mixed peacock/hap setup, and larger tanks make group management easier. Some specialist references recommend even larger group aquariums where several fish are kept together. The important point is stability and space: enough footprint for territories, enough water volume to keep pH and hardness steady, and enough filtration to handle cichlid feeding. Keep the pH around 7.6-8.6, maintain good carbonate hardness, and avoid sudden changes during water changes.

Behaviour and Compatibility

Sulphurhead Peacocks are often described as among the more peaceful Malawi cichlids, but peaceful is relative. Males still display, defend space and compete for attention. Avoid highly aggressive, frantic mbuna and avoid mixing with tiny community fish that do not share the same water chemistry. Good companions are usually calmer Aulonocara, peaceful to moderately assertive Lake Malawi haps, and suitable Synodontis catfish in a large enough aquarium.

Do not mix several similar-looking Aulonocara forms casually if you want to avoid hybridisation. Females of many peacock species can look alike, and mixed groups can produce fish that are difficult to identify later. A species-focused group or a carefully planned all-male display can work, but each route needs proper research and a large enough tank.

Feeding

This species naturally searches sand for small invertebrates. In the aquarium, use quality cichlid pellets or granules as the staple and rotate frozen foods such as mysis, brine shrimp, daphnia, krill and insect larvae. Feed small portions that are eaten quickly, and spread food so less dominant fish get a chance. Avoid a constant heavy diet of rich meaty foods and avoid overfeeding for fast colour. Clean water and steady minerals do more for long-term colour than forcing growth.

Breeding Notes

Aulonocara maylandi is a maternal mouthbrooder. A displaying male courts females, and the female carries eggs and developing fry in her mouth. Brooding females need quiet and space; constant harassment can cause stress and brood loss. If breeding is intended, use a calm group with more females than males and provide enough rockwork and open sand for natural display behaviour.

Buying and Delivery Notes

When a size option is available, the page will show the active variant and checkout delivery options. Eligible first-time customers can use the current first-order offer when it is active, and live arrival cover applies according to the live-fish delivery terms shown at checkout.

Choose this fish if you want a calmer, specialist Malawi peacock with strong male colour potential and you can provide the right hard-water setup. Skip it if your aquarium is soft, acidic, too small, already dominated by aggressive mbuna, or built around delicate community fish.