Aulonocara steveni Usisya

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Aulonocara steveni Usisya, also known as Flavescent, is a cichlid from the Lake Malawi peacock cichlid group. This geographic form is valued for its elegant shape, pale coloration and habit of investigating the substrate. Like several Aulonocara, it detects small organisms buried in the sand with sensory pores on its head. It is best suited to a spacious African cichlid aquarium with rocks, sand and strong filtration, where water quality remains stable. Its availability is intermediate: it is less common than many captive-bred forms, but it remains accessible to specialized aquarists. Preserving the locality identity is important when keeping and breeding this fish.

General species description

Aulonocara steveni Usisya is a haplochromine cichlid from Lake Malawi, generally associated with transition areas between rocks and sandy substrates. It belongs to Aulonocara, commonly called peacock cichlids, many of which search for food by detecting movement near the bottom. Its behavior is active, alert and relatively peaceful for an African cichlid, although males defend breeding territories. The aquarium should provide rock shelters and broad areas of fine sand. It should not be kept with overly aggressive fish or with closely related Aulonocara if maintaining the geographic strain is a priority. Successful care requires efficient filtration, good oxygenation and stable alkaline water.

Geographic origin and biotope

Aulonocara steveni Usisya comes from Lake Malawi in East Africa, particularly the Usisya area on the northwestern shore. This population is associated with clear, well-oxygenated and alkaline lake habitat containing scattered rocks, sandy areas and mineral debris. The bottom allows the fish to sift sand while searching for small invertebrates. Aquatic vegetation is usually limited in exposed rocky areas; the habitat is structured mainly by rocks and sand deposits. In the aquarium, recreate this combination with water maintained at 24 to 27 °C, a pH of approximately 7.6 to 8.6 and steady water movement.

Precise locality and local name

The Usisya form is associated with Usisya, a locality on the northwestern shore of Lake Malawi in Malawi. The name “Usisya” is mainly used to identify this geographic population in the aquarium trade and among Malawi cichlid keepers. The common name Flavescent refers to the yellowish or golden coloration often seen in adult males, especially when the fish is settled and in breeding condition. This trade name does not replace the locality designation, which remains important for avoiding strain mixing. Keeping a distinct population helps preserve the identity and value of this variety in captivity.

Appearance and physical characteristics

Aulonocara steveni Usisya has an elongated, laterally compressed body, a rounded head and large fins typical of Aulonocara. Adult males develop stronger coloration, often combining golden yellow, blue and metallic tones depending on age, mood and social status. Females are usually less vivid, with a gray-brown body and less noticeable vertical markings. The fins may show blue, yellow or orange contrasts. As in other peacock cichlids, sensory pores on the head help detect movements from organisms hidden in the sand. Maximum adult size is about 15 cm, with males commonly being more colorful and somewhat larger than females.

General diet

In nature, Aulonocara steveni Usisya mainly searches for small invertebrates and other benthic organisms in the sand. It takes a mouthful of substrate, sorts it with its gill rakers and expels the sand through the opercula. In the aquarium, provide varied food based on quality Malawi cichlid pellets, small frozen foods and preparations containing marine protein or crustaceans. Feed moderate portions to prevent obesity and water pollution. Very fatty food or an exclusively meaty diet should be avoided. Several small meals help maintain good condition, natural coloration and normal sifting behavior. Foods containing a significant vegetable component may supplement the diet, but should not become the sole foundation of feeding.

Essential data

• Name of original river: Usisya
• Local name used: Flavescent
• Origin of the scientific name: Aulonocara is a Greek-derived genus name; steveni is the specific epithet.
• Etymology of the full name: Aulonocara is approximately understood as “grooved head” or “hollowed head,” referring to the sensory pores; steveni is a Latinized specific name.
• Common/vernacular names: Flavescent; Usisya Peacock
• Family: Cichlidae
• Subfamily: Pseudocrenilabrinae
• Name pronunciation: aw-lo-no-KAR-ah steh-VEH-nee
• Discovery: David H. Eccles and Ethelwynn Trewavas, 1989
• Maximum adult size: About 15 cm
• Water temperature and pH: 24 to 27 °C; pH 7.6 to 8.6
• Waterway appearance and surrounding vegetation: Clear alkaline lake habitat with rocks, sand and limited aquatic vegetation in exposed areas
• Typical tankmates: Copadichromis azureus Mbenji, Labidochromis caeruleus, Sciaenochromis fryeri, Cyrtocara moorii, Synodontis njassae
• Temperament and behavior: Active and territorial while breeding, generally peaceful with suitable tankmates
• Water depth: Rocky and sandy littoral areas, generally shallow to intermediate depth
• Sexual dimorphism: Male larger and much more colorful; female gray-brown and more subdued
• Bottom structure and flow: Fine sand, rocks and well-oxygenated water with steady circulation

In your aquarium

To succeed with Aulonocara steveni Usisya, provide a spacious aquarium, stable rockwork and a broad area of fine sand. Maintain warm, alkaline, clean and well-oxygenated water, and avoid aggressive tankmates or mixing geographic populations. A varied diet offered in small portions supports coloration and helps limit digestive problems. Respecting male territorial behavior, especially during breeding, is essential for natural activity and long-term compatibility.