Red-breasted Acara

These fish reach about 5 cm in length. Their coloration combines gray and red-blue tones. The back is dark, while the belly is bright red—the feature that gave the species one of its common names. The fins and tail are marked with blue spots. Sexual dimorphism is subtle: males can be distinguished by a slightly more elongated and pointed anal fin. Otherwise, there are few visible differences between the sexes.

This species is naturally found in South America, in Bolivia and western Brazil. It inhabits the Guaporé River basin, which forms the natural border between these two countries. In rivers, the red-breasted acara prefers slow-flowing sections or quiet backwaters. The bottom of its habitat is typically sandy, covered with fallen leaves and abundant wood.

This fish has a peaceful and calm temperament. It gets along well with other non-aggressive species of similar size. Good tank mates include fish from the same region, such as many characins. They prefer to be in a small group or at least in a pair.

For a small group of 5–6 fish, the aquarium should be at least 80 litres. The tank setup can be fairly simple: sandy substrate, some wood, and densely planted areas. Adding fallen leaves to the bottom provides a natural look and tints the water with a natural brownish hue from tannins released as the leaves break down. Keeping red-breasted acara is accessible even to beginners. All you need is to maintain suitable water parameters (temperature and chemistry) and perform regular maintenance. This usually means a weekly partial water change, removal of waste, and equipment checks.

An omnivorous species, the red-breasted acara readily accepts most common foods in the aquarium. These include dry flakes, pellets, and live or frozen artemia, daphnia, and bloodworms. For good health, the diet should be varied and include several food types, supplemented with plant material such as spirulina flakes.

In good conditions—clean water, varied food, and suitable companions—the red-breasted acara spawns readily. During breeding season, the male and female form a pair and choose a spawning site. This can be any smooth, cleaned surface, such as a flat stone. The female lays several dozen eggs. Both parents stay near the clutch, protecting it from threats. They continue to care for the fry after hatching.

Poor water conditions are often the root cause of disease: when parameters go out of range, the fish's immunity drops, making it vulnerable to various infections present in the environment. If you suspect illness, first check the water parameters and confirm that nitrogen cycle products are not at dangerous levels. Restoring proper conditions often leads to recovery. In some cases, medication may be needed.

When selecting fish, look for activity and the absence of visible damage: scales should lie flat, fins should be intact with no signs of decay or white coating. A healthy fish shows curiosity about its surroundings and feeds actively. Avoid specimens with sunken bellies, signs of emaciation, or an abnormally swollen belly, as well as fish that constantly hide in tank corners or hover at the surface—these may indicate stress or disease. Because of its similarity to related species such as Laetacara curviceps, carefully examine the coloration and fin shape, as misidentifications are common in the trade.