Common Name: Blackberry Silver Dollar
Scientific Name: Myleus schomburgkii sp.
Other Names: Disk Tetra, Black Bar Silver Dollar
The Blackberry Silver Dollar is a distinctive and attractive freshwater fish known for its disc-shaped body and striking coloration. The body is typically silvery with a unique blackberry-like pattern of dark spots and bars, especially prominent in juveniles. As they mature, the spots become more pronounced, giving them a highly appealing and unique appearance. They have a laterally compressed body, large eyes, and a slightly forked tail, which adds to their charm in an aquarium setting.
Habitat and Distribution: The Blackberry Silver Dollar is a man-made variety, selectively bred for its unique pattern and coloration. The natural variety of this species, the Myleus schomburgkii, is native to the Amazon Basin in South America, primarily found in the rivers and floodplains of Brazil, Peru, and Colombia. They inhabit slow-moving waters with abundant vegetation and submerged roots, providing shelter and foraging opportunities. These fish are adapted to blackwater conditions, where the water is soft, acidic, and stained with tannins from decaying plant matter. They are often found in schools, swimming in the mid to upper levels of the water column.
Size and Lifespan: In captivity, Blackberry Silver Dollars typically reach about 6 inches (15 cm) in length. Their lifespan can range from 8 to 10 years, depending on the care and conditions provided in the aquarium. Ensuring a balanced diet, clean water, and sufficient space can help them reach their full potential and live a healthy life.
Diet and Behavior: Blackberry Silver Dollars are primarily herbivorous, feeding on plant material, algae, and fruits in the wild. In an aquarium, their diet should include a variety of plant-based foods such as blanched spinach, zucchini, and high-quality algae wafers. They can also be fed protein-rich pellets and occasional frozen bloodworms as supplements. These fish are peaceful and social, best kept in groups of six or more to prevent stress and encourage natural schooling behavior. They are active swimmers and enjoy a spacious tank with plenty of swimming room.
Breeding and Reproduction: Breeding Blackberry Silver Dollars in captivity can be challenging due to their specific environmental needs. They are egg scatterers, and successful breeding typically requires a large tank with soft, acidic water and a temperature slightly higher than normal. The breeding pair should be conditioned with a high-quality diet. During spawning, the female scatters eggs among plants or substrate, and the male fertilizes them. The parents do not guard the eggs, so a separate breeding tank or protective measures are necessary to prevent the eggs from being eaten.
Aquarium Care and Tank Requirements: To keep Blackberry Silver Dollars, a large aquarium of at least 75 gallons is recommended. The tank should include plenty of plants, driftwood, and hiding spots to mimic their natural habitat. A sandy or fine gravel substrate is ideal, along with moderate water flow to simulate river conditions. Regular water changes and efficient filtration are essential to maintain water quality, as these fish are sensitive to poor conditions.
Ideal Tank Mates: Blackberry Silver Dollars are peaceful and can be kept with other non-aggressive, similarly sized fish. Suitable tank mates include other large tetras, peaceful cichlids, and bottom-dwelling catfish. They should not be housed with overly aggressive or significantly smaller fish, as this can lead to stress or bullying.
Difficulty Level: Intermediate. While they are hardy, their specific dietary needs and preference for pristine water conditions require attentive care.
Water Parameters:
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Temperature: 75-82°F (24-28°C)
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pH: 6.0-7.5
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General Hardness (GH): 3-12 dGH
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Carbonate Hardness (KH): 2-6 dKH
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Ammonia: 0 ppm (ideal), up to 0.25 ppm (max)
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Nitrite: 0 ppm (ideal), up to 0.25 ppm (max)
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Nitrate: <20 ppm (ideal), up to 40 ppm (max)
Additional Information:
- The Blackberry Silver Dollar's unique pattern and peaceful nature make it a favorite among aquarists who enjoy schooling fish.
- They play an important role in their native ecosystem by controlling plant growth and contributing to nutrient cycling.
- These fish are excellent candidates for community tanks due to their non-aggressive behavior and striking appearance, adding both movement and visual interest to the aquarium.
- Fun fact: Their name "Silver Dollar" comes from their round, flat shape, resembling the old American silver dollar coin.
