Paratilapia polleni

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Introduction — Paratilapia polleni, also known as Bleekeri Starry Night, is a Malagasy cichlid valued for its dark body sprinkled with pale spots. This species still requires careful preparation: it grows large, develops territorial behavior and needs a spacious, well-structured and stable aquarium. Native to the fresh waters of Madagascar, it prefers warm, clean and well-oxygenated water, with shelters made from rocks and large roots. Its availability is considered intermediate in the aquarium trade; it is not seen everywhere, but it can be obtained by specialized aquarists who are able to provide suitable conditions.

General species description

Paratilapia polleni is a medium to large Malagasy cichlid, appreciated for its striking appearance and observant behavior. Its sturdy, relatively deep body gives it an impressive presence, while its growth and territorial nature require more room than an ordinary community cichlid. The species may be kept alone, as a pair or in a group of juveniles, but adults often establish and defend firm territories, especially during spawning. An aquarium of several hundred litres is preferable, particularly for an adult pair. Its availability is generally considered intermediate in the specialized trade. It is best suited to an experienced aquarist who can maintain stable water conditions and monitor interactions between tank mates.

Geographical origin and biotope

Paratilapia polleni is endemic to Madagascar, where it inhabits freshwater environments associated with river basins and waterways in the northwestern and western parts of the island. Its natural habitat includes slow to moderately flowing areas with submerged cover, irregular banks and bottoms made of sand, gravel and stones. The water may be slightly tinted by organic matter, although good circulation remains important. In an aquarium, this variety of structure should be recreated rather than replaced by an open, bare layout: use firmly placed rocks, roots, caves and open swimming areas. Efficient filtration and regular water changes are essential for its health.

Precise location and local name

The natural distribution of Paratilapia polleni is associated with the freshwater systems of northwestern and western Madagascar. Malagasy populations may be separated by different river basins, making geographic origin important for conservation and breeding projects. The Malagasy vernacular name marakely is used for freshwater fishes in several contexts, while Bleekeri Starry Night remains primarily an aquarium and trade name. When available, collection or strain information should be retained, and mixing populations should be avoided. This approach supports more responsible husbandry of an island species whose regional diversity deserves protection.

Appearance and physical characteristics

The body of Paratilapia polleni is stocky, laterally compressed and covered by a base colour ranging from greyish brown to bluish black, depending on mood, age and lighting. Numerous pale, sparkling spots cover the flanks, head and fins, creating the visual effect behind the name Starry Night. The dorsal and anal fins are well developed, and the unpaired fins may show blue or greenish reflections. Colour often becomes stronger when the fish is dominant, stimulated or breeding. Adults may reach approximately 28 cm under good conditions, although many aquarium specimens remain smaller. Its overall shape and powerful jaws reflect the opportunistic feeding habits of this cichlid.

General diet

Paratilapia polleni is an opportunistic omnivore that uses a wide variety of food resources in nature. Its aquarium diet should combine quality pellets for large cichlids, frozen foods such as shrimp, krill, bloodworms and small crustaceans, along with regular plant matter. Foods containing algae, spinach or other vegetable ingredients can be included without replacing a balanced protein base. Adults are best fed in small portions once or twice daily to reduce waste and excess weight. Dietary variety supports the starry coloration, growth and overall condition. Avoid excessive mammal or fatty fish products, which can contribute to digestive problems.

Essential data

• Name of original river: River basins of western and northwestern Madagascar
• Local name used: Marakely
• Origin of the scientific name: Paratilapia polleni was described in the genus Paratilapia; polleni honours François Pollen
• Etymology of the full name: Para means near or related; tilapia is an Africanized vernacular name used in cichlid nomenclature; polleni honours François Pollen
• Common/vernacular names: Bleekeri Starry Night, Starry Night Cichlid, marakely
• Family: Cichlidae
• Subfamily: Pseudocrenilabrinae
• Name pronunciation: pah-rah-tih-LAH-pee-ah - poh-LEH-nee
• Discovery: Pieter Bleeker, 1868
• Maximum adult size: Approximately 28 cm
• Water temperature and pH: 24 to 28 °C; pH 6.5 to 8.0
• Waterway appearance and surrounding vegetation: Slow to moderately flowing fresh water, irregular banks, roots, rocks and tropical riparian vegetation
• Typical tank mates: Paretroplus maculatus, Paretroplus menarambo, Ptychochromis oligacanthus, Ptychochromis grandidieri, Paratilapia bleekeri, Oxylapia polli
• Temperament and behaviour: Territorial, especially as a pair and during breeding; observant and dominant
• Water depth: Littoral and shallow to intermediate-depth areas
• Sexual dimorphism: Difficult to identify with certainty; adult males may be larger and more vividly coloured
• Bottom structure and flow: Sand, gravel, stones and woody debris; low to moderate flow

In your aquarium

Success with Paratilapia polleni depends on three factors: a large aquarium, strong filtration and a layout that lets each fish claim a shelter. Keep the water warm, clean and stable, provide a varied diet and avoid tank mates that are very small or exceptionally peaceful. Because the species can become territorial, create visual barriers and several shelters instead of providing only one cave. Successful spawning should be accompanied by careful management of pair aggression. Because this island species has moderate availability, choose fish from identified lines whenever possible and make responsible conservation a priority.