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Aulonocara steveni Chiwindi, also known as Blue Neon, is an African cichlid from the peacock cichlid group of Lake Malawi. Its bright blue coloration and generally calmer behavior than that of mbuna make it a popular choice for an aquarium devoted to Malawi cichlids. Mature males usually develop a metallic blue body, while females remain more subdued. This geographic form is associated with Chiwindi, in Mozambique, along a rocky section of the lake. To preserve its color and limit conflicts, provide alkaline water, strong filtration, and a carefully planned community.

General species description

Aulonocara steveni Chiwindi is a “peacock” cichlid that is generally less combative than many mbuna, although it remains territorial, particularly when spawning. The male defends a small breeding site on the substrate, while females and juveniles display duller colors. In an aquarium, it is best to keep one male with several females and provide a layout with broken lines of sight. It should not be housed with highly aggressive species or other geographic forms of Aulonocara, reducing the risk of hybridization. The Blue Neon form is valued for its strong metallic blue coloration and its regular activity near the lower and middle areas of the aquarium.

Geographic origin and biotope

This form comes from Lake Malawi, in the Chiwindi area of Mozambique. It inhabits rocky shoreline zones where rock piles, boulders, and sandy patches create a mixture of shelter and feeding surfaces. The water is clear, mineral-rich, and alkaline, with natural movement varying according to shoreline exposure. In an aquarium, a layout of stable rocks and fine sand better reflects this environment than a densely planted setup. Plants are limited in the rocky habitat; a few hardy plants may nevertheless be used if the layout and water parameters suit them.

Precise locality and local name

The name Chiwindi refers to the collection locality on the Mozambican shore of Lake Malawi. In the aquarium trade, this population is mainly identified as Aulonocara steveni Chiwindi or by the common name Blue Neon. The locality designation is important because it separates this form from other populations sold under similar names. Keep this information in breeding and stock records, and avoid mixing fish from different geographic origins. This approach helps maintain a visually consistent strain and limits crosses between regional forms.

Appearance and physical characteristics

The body is fairly deep and laterally compressed, with a rounded head and a protrusible mouth suited to searching for small prey in the sand. Mature males generally show electric-blue to neon-blue coloration, sometimes with darker reflections along the back and contrasting markings on the fins. Females are gray-brown to silvery and may display vertical bars. As in other Aulonocara, sensory pores on the head help detect vibrations and the movement of prey buried in the substrate. Adult size depends on feeding, sex, and rearing conditions.

General diet

In nature, Aulonocara steveni Chiwindi examines sand and rocky surfaces to locate small invertebrates and other benthic organisms. In the aquarium, its diet should be varied and based mainly on quality pellets for Malawi cichlids, supplemented with suitable frozen foods. Small portions once or twice daily suit adults, while juveniles benefit from more frequent meals. Avoid very fatty foods and excessive heavy animal protein, which may interfere with digestion. A balanced diet supports the male’s blue coloration and the condition of the females.

Essential data

• Name of original river: Chiwindi
• Local name used: Chiwindi; Blue Neon in the aquarium trade
• Origin of scientific name: Aulonocara steveni
• Etymology of the full name: Aulonocara refers to the distinctive head shape; steveni is the specific name; Chiwindi identifies the geographic locality
• Common/vernacular names: Blue Neon, Chiwindi Aulonocara
• Family: Cichlidae
• Subfamily: Pseudocrenilabrinae
• Pronunciation: aw-lo-no-KAR-ah - steh-VEH-nee chee-WIN-dee
• Maximum adult size: About 15 cm
• Water temperature and pH: 24 to 27 °C; pH 7.6 to 8.6
• Appearance of the watercourse and surrounding vegetation: Clear rocky and sandy lake shore; limited aquatic vegetation
• Typical tankmates: Labidochromis caeruleus Nkhata Bay, Copadichromis azureus Mbenji, Sciaenochromis fryeri
• Temperament and behavior: Territorial but generally moderate; the male defends a spawning site
• Water depth: Rocky and sandy shoreline zones
• Sexual dimorphism: Brightly colored blue male; female duller, often gray-brown and barred
• Bottom structure and flow: Boulders, rock piles, and sand; weak to moderate movement depending on exposure

In your aquarium

Success depends on a spacious aquarium, stable water, and a securely built rocky layout. Provide shelters, broken sight lines, and more females than males. Strong filtration, regular water changes, and moderate feeding support health and coloration. Avoid mixing localities and watch for excessive dominance. With a peaceful community, a stable alkaline pH, and consistent maintenance, Blue Neon can become a long-lasting centerpiece of a Malawi-style aquarium.