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The Microgeophagus ramirezi sp. Black German, also called the Black German Ram, is a very dark captive-bred variety of the well-known ram cichlid. It retains the small size, compact body and territorial behavior of the original South American Cichlidae. Its black coloration, enhanced by blue iridescence and sometimes yellow or orange markings, makes it a very rare and sought-after aquarium form. Like other rams, it requires warm, stable and well-maintained water. A calm layout, gentle filtration and a varied diet are essential for maintaining its health and coloration.

General species description

Microgeophagus ramirezi sp. Black German is a commercial variety of Microgeophagus ramirezi, not a separate species. This small dwarf cichlid usually reaches about 5 cm as an adult. It stays close to the bottom but also explores the middle levels of the aquarium, especially when it feels secure. The Black German form is recognized by very dark pigmentation and a more uniform appearance than the wild form. It remains territorial, particularly when a pair forms and during spawning. This variety is considered very rare in the aquarium trade, so it deserves stable water and careful acclimation.

Geographic origin and biotope

The nominal species comes from the Orinoco lowlands of Venezuela and Colombia, in quiet areas of the Orinoco drainage. The trade name “Black German” refers to a captive-selected line developed in Germany, not to a natural German origin. In nature, rams inhabit warm, slow-moving or nearly still waters, often bordered by plants, roots and plant debris. An aquarium inspired by this habitat should provide moderate lighting, shelter and low flow, together with soft, slightly acidic water.

Precise location and local name

The natural range of Microgeophagus ramirezi is associated with the Venezuelan and Colombian Llanos, within the Orinoco drainage. Ramirezi is the name commonly used in the aquarium hobby, while Black German Ram identifies the selected variety described here. This trade name is not a local name used by riverside communities. In an aquarium, this form is best kept in a peaceful environment rather than with large cichlids or highly boisterous fish.

Appearance and physical characteristics

The body is short, deep and laterally compressed, with long dorsal and anal fins. In the Black German variety, dark pigmentation covers much of the body and fins, while metallic blue highlights may appear on the head, cheeks and flanks. The eyes are often reddish, as in many captive ram strains. Coloration varies with the strain, age, sex and emotional state. Males may have a slightly heavier build and more developed fins; however, sexing is more reliable in mature fish displaying breeding behavior.

General diet

The ram is an omnivore that accepts small animal foods as well as plant-based and prepared foods. A quality diet should combine fine pellets made for small cichlids with frozen foods such as brine shrimp and bloodworms, and occasionally small live foods. Meals should be small, frequent and eaten quickly to prevent water pollution. A varied diet supports growth, general condition and color intensity. Overfeeding should be avoided because this species reacts poorly to water containing excessive nitrogenous waste.

Essential data

• Name of source river: Orinoco drainage
• Local name used: ramirezi
• Origin of the scientific name: Microgeophagus ramirezi is the scientific name of the nominal species; Black German is a captive-bred line.
• Full-name etymology: Microgeophagus roughly means “small earth-eater”; ramirezi honors Manuel Vicente Ramírez; Black German describes the dark German-selected line.
• Common/vernacular names: ramirezi, butterfly cichlid, Black German Ram
• Family: Cichlidae
• Subfamily: Cichlinae
• Name pronunciation: my-kroh-jee-oh-FEE-ah-gus rah-MEE-reh-zee
• Discovery: described by George S. Myers and R. R. Harry in 1948
• Maximum adult size: about 5 cm
• Water temperature and pH: 27 to 30 °C; pH 5.0 to 7.0
• Stream appearance and surrounding vegetation: warm, calm and shallow water with plants, roots and plant debris
• Typical tankmates: Paracheirodon axelrodi, Hoplisoma sterbai, small peaceful tetras
• Temperament and behavior: peaceful, territorial near the spawning site; usually kept as a pair or in a small group depending on the layout
• Water depth: shallow areas
• Sexual dimorphism: males are often slightly larger, with more developed fins; females are generally rounder
• Bottom structure and current: fine substrate, open areas and shelters; low flow

In your aquarium

To keep Microgeophagus ramirezi sp. Black German successfully, use a mature, well-oxygenated aquarium without rapid temperature or pH changes. A fine sand substrate, roots, plants and shaded areas help reduce stress. Water quality is the priority: perform regular water changes, use gentle filtration and remove waste promptly. Avoid aggressive or overly fast tankmates. A varied diet and small portions support good condition, while warm, stable water helps preserve the fish’s dark coloration and vitality.