Epiplatys chevalieri

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The Epiplatys chevalieri, also known as Killifish, is a small African surface-dwelling fish valued for its slender shape and lively behavior. Native to the Congo Basin, it inhabits calm, shaded waters in forest environments. This species suits aquarists looking for an elegant fish, although it remains uncommon in the aquarium trade. Kept in a well-covered, planted and peaceful aquarium, Epiplatys chevalieri displays its colors and natural behavior more readily. Like many killifish, it spends most of its time near the surface and benefits from a varied diet made up of small prey.

General species description

Epiplatys chevalieri is a small African killifish associated with the soft waters of central Africa. It mainly lives at the surface, where its upturned mouth allows it to catch prey falling onto the water. Its behavior is generally lively, alert and fairly peaceful, although males may chase one another. Keeping a small group with more females than males helps reduce tension. The species is uncommon among retailers, making it an interesting choice for specialized aquarists. It should be housed with calm fish of similar size, since its small body and fins can be vulnerable to overly active or predatory tank mates.

Geographical origin and biotope

Epiplatys chevalieri originates from the Democratic Republic of the Congo, within the Congo Basin. It is associated with small forest streams, marshy areas and slowly renewing waters where dense bank vegetation strongly filters the light. The water is often soft and slightly acidic to neutral, with stable temperatures under the forest canopy. In an aquarium, it appreciates similar conditions: subdued lighting, floating plants, roots and quiet surface areas. Gentle filtration is preferable to strong current. The specimens described here are listed as wild collected; gradual acclimation and careful quarantine are therefore recommended.

Precise locality and local name

The known range of Epiplatys chevalieri lies in the Congo drainage basin of the Democratic Republic of the Congo. The most useful aquarium vernacular name is Killifish, an English common name widely applied to many egg-laying surface fish. Chevalier’s killifish may also appear in English references. In the trade, identification should always be checked using the complete scientific name, since killifish includes many species with different requirements and reproductive strategies. For this reason, it is preferable to keep the geographical origin with the fish and avoid mixing separate populations.

Appearance and physical characteristics

Epiplatys chevalieri has an elongated body, a relatively flattened head and a distinctly upturned mouth. This shape reflects its feeding habits in the upper water layer. The dorsal fin is set toward the rear of the body, while the pectoral fins assist with short, precise movements near the surface. Its coloration may show subdued tones enhanced by markings and iridescent reflections when the fish is well acclimated. Males are generally more colorful and have more developed fins; females often appear rounder and less contrasting. Maximum adult size is about 7 cm.

General diet

Epiplatys chevalieri is a small opportunistic predator that mainly searches for tiny organisms at or just below the surface. In aquariums, it accepts frozen foods such as brine shrimp, daphnia and mosquito larvae, as well as suitably sized live prey. Quality dry food may be offered, but it should complement rather than replace protein-rich foods. Feeding small portions at the surface respects its natural behavior and helps limit waste. Young fish benefit from frequent feedings of baby brine shrimp. A varied diet supports male coloration, body condition and breeding readiness.

Essential data

• Name of native river: Congo Basin
• Local name used: Killifish
• Origin of the scientific name: Epiplatys is a genus name of Greek origin; chevalieri honors Chevalier.
• Etymology of the full name: Epiplatys refers to the generic name; chevalieri is a patronymic name.
• Common/vernacular names: Killifish; Chevalier’s killifish
• Family: Nothobranchiidae
• Subfamily: Nothobranchiinae
• Name pronunciation: eh-pi-PLAT-iss - shev-ah-lee-AIR-ee
• Discovery: Jacques Pellegrin, 1904
• Maximum adult size: about 7 cm
• Water temperature and pH: 22 to 26 °C; pH 6.0 to 7.5
• Stream appearance and surrounding vegetation: calm, shaded water with dense vegetation, roots and floating plants
• Typical tank mates: Barbus hulstaerti, Phenacogrammus interruptus, Congochromis sabinae, Nanochromis parilus, Steatocranus casuarius
• Temperament and behavior: lively and generally peaceful, spending most of its time at the surface; males may chase one another
• Water depth: shallow to moderate, especially along quiet margins
• Sexual dimorphism: males are more colorful with more developed fins; females are duller and often rounder
• Bottom structure and flow: leaf litter, mud or fine sand; low to moderate current
• Specimen status: wild-collected species; uncommon in the aquarium hobby

In your aquarium

Success with Epiplatys chevalieri depends on a tightly covered aquarium, since this surface fish may jump when startled. Provide soft to slightly acidic water, moderate flow, floating plants and areas of plant cover. A varied diet based on small prey supports its condition and coloration. Tank mates should remain peaceful, with no fish large enough to view it as prey. Because this is a wild-collected species, quarantine and gradual acclimation are especially important. Stable, attentive care will allow you to enjoy this uncommon African killifish at its best.