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Symphysodon aequifasciatus, also known as Royal Trombetas, is an Amazonian cichlid valued for its round body, royal coloration, and social behavior. This geographic form of discus comes from the Rio Trombetas in Brazil, where it inhabits warm, soft water often colored by organic matter. It is very rare in the aquarium trade, especially when wild-collected fish are involved, and is best suited to aquarists who can maintain stable water and excellent sanitary conditions. This profile covers its appearance, native habitat, feeding needs, and the key parameters required for successful acclimation.

General species description

Symphysodon aequifasciatus is a discus from the Cichlidae family, recognized by its strongly laterally compressed body and calm swimming style. The species lives in groups and develops a social hierarchy; it generally feels safer when kept with several conspecifics. Royal Trombetas is a very rare geographic form in the aquarium trade. The specimens offered here are wild-collected, so strict quarantine, gradual acclimation, and readily accepted foods are important. Its sensitivity to changes in temperature, pH, and conductivity calls for a mature, spacious, and carefully maintained aquarium.

Geographic origin and biotope

This population comes from Brazil, in the basin of the Rio Trombetas in Amazonia, within Pará State. It inhabits calm or moderately flowing areas, including margins, quiet bays, and sections influenced by flooded forest. The water may be amber-colored because of tannins released by leaves and wood, with low mineral content, high temperature, and acidic to mildly acidic pH. The natural setting includes roots, submerged branches, leaf litter, and light filtered by riverside vegetation. In an aquarium, gentle filtration and shaded areas reproduce this setting more appropriately than strong current.

Precise location and local name

The reference locality is the Rio Trombetas, a left-bank tributary of the Amazon River in northern Pará State. In the specialized trade, this form is primarily identified as Royal Trombetas. In Brazil, discus are commonly called acará-disco, although that name refers to the group rather than this particular geographic form. The origin label should be preserved carefully because trade names may group fish with different patterns or lineages. A wild fish label should ideally include the basin and arrival date.

Appearance and physical characteristics

Symphysodon aequifasciatus has a tall, rounded, laterally compressed body, with long dorsal and anal fins that emphasize its disc-like shape. Royal coloration generally combines blue-green, turquoise, or reddish-brown tones crossed by variable wavy lines and vertical bars. Marking intensity changes with mood, age, lighting, and surroundings. The red to orange eyes can be especially noticeable in adults. Adult fish may reach about 20 cm, although many aquarium specimens remain smaller. Body shape and undamaged fins are useful indicators of condition.

General diet

In nature, Symphysodon aequifasciatus feeds on small aquatic prey, crustaceans, insect larvae, and various animal or plant resources found among leaf litter. In aquaria, offer a varied diet consisting of quality discus pellets, suitable frozen foods, and occasionally properly prepared sanitary foods. Wild fish may initially refuse dry foods; repeatedly offering small portions helps encourage feeding. A rich but controlled diet, given several times daily, supports growth without unnecessarily polluting the water. Remove leftovers promptly because this species has limited tolerance for organic pollution.

Essential data

• Native river: Rio Trombetas
• Local name used: Royal Trombetas
• Origin of the scientific name: Symphysodon aequifasciatus is the zoological name assigned to this discus species.
• Complete name etymology: Symphysodon approximately means joined or fused teeth; aequifasciatus means equally banded or uniformly banded.
• Common/vernacular names: Royal Trombetas; discus; acará-disco in Brazil.
• Family: Cichlidae
• Subfamily: Cichlinae
• Name pronunciation: sim-fy-so-don ee-kwih-fas-see-AH-tus
• Discovery: Jacques Pellegrin, 1904.
• Maximum adult size: About 20 cm.
• Water temperature and pH: 28 to 30 °C; generally pH 5.0 to 7.0.
• Waterway appearance and surrounding vegetation: Calm to moderately flowing, often amber-colored water bordered by flooded forest, roots, branches, and leaf litter.
• Typical tankmates: Small Amazonian tetras; callichthyid catfish; peaceful Amazonian cichlids of comparable size.
• Temperament and behavior: Peaceful, social, and hierarchical; it should be kept in a group and may become territorial when spawning.
• Water depth: Shallow to intermediate areas near banks, quiet bays, and root-filled sections.
• Sexual dimorphism: Very difficult to determine outside the breeding period; genital papilla shape provides a more reliable indication.
• Bottom structure and flow: Soft bottom covered with leaves, wood, and plant debris; low to moderate flow.
• Availability status: Very rare; wild-collected specimens and exclusive at Ton.Fish in Canada.

In your aquarium

Success with Symphysodon aequifasciatus depends on a mature aquarium, warm water, and exceptional stability. Keep a group, provide efficient biological filtration, moderate flow, and regular water changes. With wild-collected fish, quarantine and careful monitoring of feeding are priorities. Avoid boisterous or overly competitive tankmates. This very rare form, exclusive at Ton.Fish in Canada, deserves patient acclimation to preserve its condition, coloration, and natural behavior.