Silver Dollar - Black Barred

Species Profile Scientific Name: Metynnis maculatus Common Name: Spotted Metynnis – Silver Dollar Adult Size: 6 inches (15 cm) Life Expectancy: 10 years (with proper care) Habitat: Slow-moving rivers and floodplain lakes in South America, particularly in the Amazon and Orinoco basins. They inhabit areas with dense vegetation. Tank Requirements Minimum Tank Size: 75 gallons (for a small group; they are schooling fish) Ideal Temperature: 75–82°F (24–28°C) pH Range: 5.5–7.5 Water Hardness: 4–18 dGH Temperament: Peaceful, schooling fish; best kept in groups of 5 or more. May nip fins if kept alone or with long-finned species. Diet & Nutrition Omnivorous: Prefers a plant-based diet; enjoys blanched vegetables (spinach, lettuce, zucchini), spirulina flakes, and algae wafers. Will also accept high-quality flakes, pellets, and occasional protein sources like bloodworms or brine shrimp. Appearance Color: Silver body with multiple dark spots (especially on the flanks). The body is laterally compressed and almost disc-shaped, resembling a silver dollar coin. Size: Adults grow to around 6 inches in length and have a deep-bodied, round profile. Distinctive Features Flattened, disc-like shape similar to a silver coin. Dark spots across the body distinguish it from other silver dollar species. Fast swimmers with strong schooling instincts – prefer open swimming space and low-stress environments.