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Pelvicachromis subocellatus Matadi is a small African cichlid valued especially for its rarity and family-oriented behavior. Associated with Matadi, in the Democratic Republic of the Congo, it is recognized by its compact shape, understated colors and markings that suggest an ocellus. Like several riverine cichlids, it becomes particularly fascinating during spawning, when the pair defends a territory and escorts its young. This form is best suited to aquarists who can provide stable water, a well-structured layout and peaceful tank mates. It is a wild-collected fish and is considered very rare in the aquarium hobby.

General species description

Pelvicachromis subocellatus Matadi is a dwarf cichlid in the genus Pelvicachromis, related to the popular kribensis species but much less common in aquaria. Its appeal comes from both its appearance and pair behavior: under suitable conditions, the partners select a cavity, lay eggs on a sheltered surface and actively guard their offspring. Despite its modest size, it may become territorial around its shelter, particularly while breeding. An aquarium with visual barriers, caves and clean water is more appropriate than a bare setup. Its limited availability and status as a very rare fish make it best suited to aquarists who pay close attention to provenance and care.

Geographic origin and biotope

This form is associated with Matadi, in the Democratic Republic of the Congo, in the lower section of the Congo River basin. It is associated with calm or moderately flowing areas near banks, roots, stones and natural shelters. The habitat is generally shaded by riverbank vegetation, with broken light and a bottom of sand, fine gravel and plant debris. In an aquarium, the goal should therefore be a structured environment rather than an exposed, strongly flowing channel. Effective filtration, moderate circulation and stable parameters matter more than extremely acidic water. Because the offered fish are wild-collected, gradual acclimation and quarantine are particularly prudent.

Precise location and local name

The form name Matadi refers to the port city of Matadi, in Kongo Central province, on the lower Congo River. In the aquarium trade, the English name Ocellated Kribensis is the most useful for identification. However, “kribensis” is a broad trade name and should not be taken as proof of an exact close relationship with Pelvicachromis pulcher. To prevent mix-ups, it is best to retain the complete scientific name, the Matadi locality and the collection information with each group. This traceability is important for a rare fish associated with a precise locality.

Appearance and physical characteristics

The body is short, laterally compressed and typical of a small riverine cichlid. The base color is generally beige to grayish brown, with olive or reddish reflections that may intensify according to mood, sex and breeding condition. A dark mark resembling an ocellus on the flank contributes to its common name. The fins may show yellow, orange or red tones, especially in well-conditioned individuals. The male is usually larger and more elongated, while the female is smaller and often has a rounder abdomen, particularly when ready to spawn. Coloration changes with stress: stable water and a secure layout encourage a more expressive display.

General diet

Pelvicachromis subocellatus Matadi is an omnivore with opportunistic feeding habits. In the aquarium, its diet should combine quality pellets for small cichlids, frozen foods such as brine shrimp and mosquito larvae, and small live foods when available. A spirulina-based or complete food can also be included, without treating the species as a herbivore. It is better to offer small varied portions once or twice daily than large amounts that pollute the water. During breeding, the parents and fry benefit from fine foods, including newly hatched brine shrimp. A varied diet supports vitality, coloration and breeding condition.

Essential data

• River of origin: Congo River
• Local name used: Ocellated Kribensis
• Origin of the scientific name: Pelvicachromis is built around the pelvic fins and coloration; subocellatus describes a partly ocellated appearance.
• Etymology of the full name: Pelvica refers to the pelvic fins, chromis means “fish” in older fish names; subocellatus means “somewhat ocellated”; Matadi refers to the locality of origin.
• Common/vernacular names: Ocellated Kribensis
• Family: Cichlidae
• Subfamily: Pseudocrenilabrinae
• Pronunciation: pel-vee-ka-KRO-miss sub-oh-sell-AH-tuss ma-TAH-dee
• Discovery: Albert Karl Ludwig Gotthilf Günther, 1872
• Maximum adult size: About 10 cm
• Water temperature and pH: 24 to 28 °C; approximately pH 6.0 to 7.5
• Appearance of the waterway and surrounding vegetation: Fresh to moderately flowing water, shaded banks, roots, stones and riverbank vegetation
• Typical tank mates: Peaceful small characins, small nonpredatory catfish and other similarly sized midwater species
• Temperament and behavior: Peaceful outside breeding, territorial around the cave and protective of its young
• Water depth: Shallow to intermediate bank areas
• Sexual dimorphism: Male larger and more slender; female smaller, rounder and often more strongly colored on the belly during breeding
• Bottom structure and flow: Sand, fine gravel, stones and plant debris; low to moderate flow

In your aquarium

Success with Pelvicachromis subocellatus Matadi depends on a mature, well-filtered aquarium furnished with several usable hiding cavities. A pair may be kept in a dedicated aquarium or in a carefully planned community tank, but overly boisterous, territorial or much larger tank mates should be avoided. Use smooth sand, roots, stones and hardy plants to create visual boundaries. Keep temperature and pH free from sudden changes, and perform regular water changes. Since this is a very rare wild fish, quarantine, slow acclimation and careful locality records are especially recommended practices.

Conclusion

Pelvicachromis subocellatus Matadi suits aquarists who appreciate discreet, rare species with engaging behavior. A shelter-rich layout, stable water, a varied diet and calm tank mates are the foundations of success. Its wild origin should also be respected through careful acclimation and responsible maintenance. During breeding, allow the pair to establish its territory and avoid unnecessary interference: watching the parents tend their young is one of the main attractions of this cichlid.