Moon Myloplus

These fish are characterized by a high, disc-shaped body. Adult individuals can reach a length of up to 25 cm. Their coloration is predominantly silvery and monochromatic. Males can be distinguished from females by their more elongated, red anal fin.

The natural habitat of this species covers South America. The Redhook Myloplus is found in almost all major river systems of the continent's tropical belt. It prefers sections of rivers with slow currents, especially in coastal areas where aquatic and overhanging vegetation grows abundantly.

As a schooling species, these fish need the company of their conspecifics; it is recommended to keep a group of 4–5 individuals. They are peaceful towards aquarium fish species of comparable size, but smaller fish may be at risk. Since the Redhook Myloplus prefers to swim in the middle and upper water layers, excellent tank mates for them would be bottom dwellers, such as Plecostomus or various species of Armored Catfish.

For a group of 4–5 individuals, an aquarium with a volume of 260–300 liters will be required. When choosing a tank, special attention should be paid to its length and width, which are more important than the overall height (depth). Ideal keeping conditions include soft, slightly acidic, oxygen-rich water, and subdued lighting is preferable. In the aquarium setup, it is important to provide both open areas for unobstructed swimming and secluded spots, for example, created from natural snags. The use of thickets of live plants as shelters is impractical, as the Moon Myloplus is a typical herbivorous species. In their natural environment, their diet consists mainly of plant leaves, including emergent species (shrubs, trees) that become submerged during the rainy season. In a home aquarium, their diet should primarily consist of foods with a high content of plant components. Many manufacturers offer special diets for such fish in the form of dry flakes and pellets. Additionally, pieces of vegetables and soft fruits can be offered, such as cucumbers, zucchini, green peas, fresh lettuce leaves, or spinach. Although plant-based food is key, protein supplements also play a significant role. Therefore, it is advisable to use universal dry foods, and also periodically include live or frozen brine shrimp, bloodworms, and other small invertebrates in their diet. In some cases, they may pose a threat to smaller tank inhabitants.

In their natural habitat, the main food source for the Silver Mylossoma (Myleus setiger) is plant leaves, including those that grow above water (shrubs, trees) and become submerged during the rainy season. In aquarium conditions, the diet should primarily consist of plant-based foods. Many manufacturers offer specialized dry foods in the form of flakes and pellets specifically designed for such fish. The diet can be supplemented with pieces of vegetables and soft fruits, such as cucumbers, zucchini, green peas, fresh lettuce leaves, spinach, and so on. Although plant-based food is key, protein supplements are also important. Therefore, it is recommended to use balanced dry foods, and also periodically offer live or frozen brine shrimp, bloodworms, and other small invertebrates. Occasionally, they may prey on smaller aquarium inhabitants. Being a schooling species, they need the company of conspecifics, so it is advisable to keep a group of 4–5 individuals. They are peaceful towards fish of comparable size, while smaller species may be in danger. Since the Redhook Mylossoma prefers the middle and upper water layers, good tank mates for them would be bottom-dwelling fish, for example, catfish from the genera Plecostomus and Armored Catfish. The main threat to the health of these fish is an unbalanced diet. Insufficient or improper nutrition reduces immunity, making them susceptible to various diseases, the pathogens of which are always present in the environment. If a disease is detected, the first thing to do is to pay attention to the diet. Details on the causes, diagnosis, and treatment can be found in the "Aquarium Fish Diseases" section.

Breeding the Silver Mylossoma in aquarium conditions is considered a challenging task. Spawning is communal and requires a spacious aquarium at least 150 cm long with dark substrate and intense lighting. To stimulate the process, the breeders are fed abundantly, and water parameters are maintained in a soft environment with hardness up to 4° dH and a temperature of 23–27 °C. Eggs are laid among dense thickets of fine-leaved plants, which serve as a substrate. Fry begin to swim freely 5–6 days after spawning.

The primary threat to the health of this species is an unbalanced diet. Insufficient or improper feeding weakens the fish's immune system, making it vulnerable to various diseases, the pathogens of which are constantly present in the environment. If signs of illness are detected, the first step is to analyze and adjust the basic diet. More detailed information on the causes, diagnosis, and treatment methods for these ailments can be found in the "Aquarium Fish Diseases" section.

When selecting individuals, attention should be paid to the integrity of the fins and the absence of external damage, as these fish are prone to injury when startled. A healthy Mylossoma should be active, have clean scales without white spots or ulcers, and display a strong appetite. It should be noted that these fish have powerful jaws and can inflict painful bites when stressed or handled carelessly. It is recommended to acquire a group of 6 or more individuals at once, as solitary keeping leads to timidity and constant stress.