Common Names
Thin Bar Silver Dollar, Sauron Silver Dollar
Scientific name
Myloplus sauron
Origin and Habitat
Native to Brazil’s Xingu River basin, including clear, fast, highly oxygenated reaches of the main river and rocky tributaries such as the Iriri, Culuene, and Bacajá. This is a current loving species that cruises midwater over granite, cobble, and coarse gravel in bright, clearwater conditions. It has not been recorded below the Volta Grande do Xingu rapids. Habitat alteration in parts of the basin is a conservation concern, so accurate locality labels matter.
Temperature and Water Conditions
Target 75 to 82 F, 24 to 28 C. Wild pH is commonly mildly acidic to near neutral, often about 6.0 to 7.2 in clearwater with low to moderate flow.
Physical Characteristics
| Feature | Detail |
|---|---|
| Body Shape | Slender, elongated |
| Coloration | Grayish silver with a thin, silvery bar along the lateral line |
| Size | Up to 3 inches (7.5 cm) |
| Behavior | Midwater swimmer, active in current |
FAQ
What is the ideal water temperature for Lord Sauron’s Silver Dollar?
The ideal water temperature range is 75 to 82 F (24 to 28 C).
What kind of habitat does this fish prefer?
It prefers clear, fast-flowing waters with rocky substrates like granite, cobble, and coarse gravel, commonly found in the Xingu River basin tributaries.
Is this species sensitive to water conditions?
Yes, it thrives in well-oxygenated, clearwater environments with mildly acidic to near-neutral pH (6.0 to 7.2) and moderate to strong current.
Lisa Hemmings –
The fish is active and beautiful in a well-maintained tank with strong flow. I keep it in a 20-gallon with a filter and gravel substrate. It swims steadily in midwater and looks natural. Good for a clearwater setup.
Joe Lawrence –
It’s a striking fish with a silver bar that stands out. I noticed it prefers a current, so I adjusted the flow in my tank. It’s not aggressive and blends well with other peaceful species.
Deirdre Bower –
I’ve had this fish for three months and it’s very healthy. The water parameters are stable and I keep it in a well-oxygenated system. It’s a good choice for aquarists who want a natural-looking, active species.