Striped Silver Dollar - Rio Capim 5cm

Striped Silver Dollar - Rio Capim

Silver Dollars have been a staple of larger freshwater aquariums for decades; however, the group contains considerably more diversity than the familiar plain silver fish most aquarists immediately recognise. The Striped Silver Dollar from the Rio Capim is one of the more unusual examples, displaying beautiful natural markings that give it a completely different appearance from the standard Silver Dollar. Identified as Metynnis fasciatus, this species combines the characteristic deep, disc-shaped body of the group with contrasting dark bands and the active schooling behaviour that makes Silver Dollars such impressive display fish.

The Striped Silver Dollar develops a broad, laterally compressed body with a reflective silver to pale bronze base colour. A series of dark vertical bands extends across the flanks, creating a strong contrast against the lighter scales and giving the fish its characteristic striped appearance. Depending on the individual and aquarium lighting, subtle yellow, olive and metallic green highlights can become visible through the body, whilst the darker markings may appear more or less intense depending on mood. The body is almost circular when viewed from the side but extremely narrow when viewed from above, allowing these fish to turn quickly and move effortlessly through open water. Maintained in a proper school, the silver scales constantly reflect light as the fish change direction together, creating an impressive display that becomes increasingly noticeable as they mature.

Sexing Striped Silver Dollars can be difficult when young, although mature males may develop subtle differences in the anal fin and colouration during breeding condition. Like other Silver Dollars, they are egg scatterers and do not provide parental care. Spawning generally involves adults releasing eggs amongst vegetation or into open water, with the eggs settling into the surrounding substrate and plants. Successful aquarium breeding is uncommon and usually requires a mature group, generous swimming space and carefully controlled water conditions.

Tank Recommendations for Your Striped Silver Dollar - Rio Capim

Striped Silver Dollars are active schooling fish and should be maintained in groups of at least five or six individuals. A minimum aquarium size of around 400 litres is recommended for a mature group, with additional swimming length particularly beneficial.

A large aquarium containing driftwood, smooth rocks and extensive open swimming space provides an excellent environment. Although they can be maintained with plants, Silver Dollars are enthusiastic herbivores and may consume or damage many commonly kept aquarium plants. Tougher plants such as Anubias may survive, although artificial plants or natural timber are often more practical. Strong filtration and a secure lid are recommended, as these fish can become startled and move surprisingly quickly.

Suitable Tank Buddies

Striped Silver Dollars are peaceful schooling fish that work extremely well in larger South American community aquariums.

Usually Compatible

Severums, Geophagus, larger peaceful tetras, angelfish, bristlenose catfish, larger Corydoras, and other medium to large community species that enjoy similar water conditions.

Sometimes Compatible

Oscars, Blue Acara, and other moderately territorial cichlids can coexist successfully in sufficiently large aquariums, although aggression and competition for food should be monitored.

Rarely Compatible

Large predatory cichlids such as Dovii and Jaguar Cichlids, aggressive predatory catfish, and other fish capable of injuring or consuming Silver Dollars should generally be avoided. Extremely small fish and shrimp may also be unsuitable as tank mates for mature individuals.

Feeding Your Striped Silver Dollar - Rio Capim

Striped Silver Dollars are primarily herbivorous and should receive a diet containing plenty of vegetable matter. Quality spirulina pellets, herbivore flakes and vegetable-based sinking foods make excellent staples and can be supplemented with blanched zucchini, spinach and other suitable greens. Occasional frozen foods may be accepted, although plant-based ingredients should form the majority of their diet.