Apistogramma sp. D39

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Apistogramma sp. D39: a dwarf cichlid worth discovering

Apistogramma sp. D39 is a South American dwarf cichlid sold under a maintenance code rather than an official species name. This designation refers to an Apistogramma form or population whose taxonomic identity is separate from that of a formally described species. Its associated country of origin is Brazil, and it appeals to aquarists looking for a small cichlid with pronounced breeding behavior. The specimens offered here are collected from the wild. Availability is moderate, making it less common than the widely distributed Apistogramma species.

General species description

Apistogramma sp. D39 belongs to the South American dwarf cichlid group. As with several Cichlidae in this genus, the male may defend a small territory, while the female generally guards the eggs and fry. In an aquarium, provide clean, stable, well-oxygenated water and plenty of cover. Its appeal lies as much in its territorial behavior as in its coloration. A quiet, lightly stocked layout makes it easier to observe interactions without increasing stress. This fish is best suited to an aquarist who pays close attention to water parameters and overall water quality.

Geographical origin and habitat

The country associated with Apistogramma sp. D39 is Brazil. The precise locality and watercourse are not retained here, so a more detailed origin should not be assigned without strain-specific collection data. Apistogramma commonly inhabit small tributaries, quiet areas and margins filled with leaves, roots and plant debris. In an aquarium, a setup inspired by a shaded forest stream, with subdued lighting and soft water, suits its general requirements well.

Precise locality and local name

In the aquarium trade, the most commonly used designation is D39. This code distinguishes the form from other undescribed or provisionally identified Apistogramma. It is not a valid scientific name and does not replace a collection locality. To preserve the traceability of wild specimens, keep the D39 code on breeding records, labels and reproduction files. This precaution helps prevent mixing visually similar populations.

Appearance and physical characteristics

Apistogramma sp. D39 has the typical profile of a small dwarf cichlid: an elongated body, developed fins and a terminal mouth suited to searching for small prey. Coloration may vary with sex, age, mood and maintenance conditions; adult males are generally larger and more colorful than females. The accentuated unpaired fins and variable dark markings contribute to its aquarium identification. As with many coded forms, appearance alone may not always separate D39 from closely related populations.

General diet

In nature, Apistogramma sp. D39 mainly feeds on small prey and organisms living on or near the substrate. In aquaria, a varied diet based on frozen or live foods supports vitality and coloration: brine shrimp, daphnia, cyclops and mosquito larvae are generally suitable. Quality dry foods may supplement meals, but should be introduced gradually and offered in small portions. Frequent, moderate feedings are preferable to one large feeding. Remove leftovers to help maintain water quality.

Essential data

• Original river: Brazil
• Local name used: D39
• Origin of the scientific name: Apistogramma is the genus name; D39 is an aquarist or population code.
• Etymology of the full name: Apistogramma comes from Greek and refers to a particular line or mark on the operculum; sp. means unidentified species; D39 is a trade or collection identifier.
• Common/vernacular names: D39 dwarf cichlid; Apisto D39
• Family: Cichlidae
• Subfamily: Cichlinae
• Name pronunciation: a-pis-to-GRAM-ma spay D thirty-nine
• Discovery: data not retained
• Maximum adult size: approximately 6 cm
• Water temperature and pH: 24 to 28 °C; pH 5.5 to 7.0
• Watercourse appearance and surrounding vegetation: quiet, shaded water with roots, leaf litter and riparian vegetation
• Typical tankmates: Corydoras agassizi; Hemigrammus rhodostomus
• Temperament and behavior: peaceful outside the breeding period, territorial around the spawning site
• Water depth: shallow areas and quiet sectors
• Sexual dimorphism: male generally larger and more colorful; female smaller and often yellowish when breeding
• Bottom structure and flow: fine substrate, leaves and roots; low flow
• Collection status: wild-collected specimens
• Rarity: moderately uncommon in the aquarium trade

For greater success

Success with Apistogramma sp. D39 depends on soft, stable water with low nitrate levels. Fine substrate, hiding places and roots allow each fish to establish a preferred area. Keep peaceful tankmates and monitor behavior during breeding, since the female may defend her brood vigorously. A varied diet, moderate lighting and regular water changes support good condition. Because these are wild-collected specimens, gradual acclimation is especially important for reducing stress and encouraging a lasting adjustment to aquarium life.