Corydoras melanotaenia

Adults grow to approximately 6 cm in length. Their appearance is typical of armored catfishes: the body is protected by two rows of bony plates instead of ordinary scales, and the first rays of the pectoral fins are modified into sharp spines. Although at first glance they resemble Golden Corydoras, upon closer inspection, Corydoras melanotaenia exhibit characteristic golden-yellow hues that shimmer into green tones. As with most Corydoras, determining the sex of these fish is quite difficult, as males and females are practically identical in external characteristics.

The species is endemic to the Meta River basin in Colombia [seriouslyfish.com]. In nature, it inhabits small tributaries, streams, as well as flooded forest areas and sandy shoals. It prefers areas with soft substrate and moderate current, where the water may be stained a weak tea color by organic matter.

These fish are distinguished by their particular peacefulness and calm disposition. They are schooling fish, so it is recommended to keep groups of at least 3–4 individuals in aquariums. They coexist well with most other aquarium fish species of comparable size. However, since they are bottom dwellers, care should be taken to avoid keeping them with territorial species, such as some loaches or other catfishes.

For keeping 3–4 catfishes, an aquarium of at least 50 liters will be optimal. The setup should preferably include a sandy substrate, several natural snags, and dense thickets of live plants. Tree bark and leaves can also be placed on the bottom. These fish prefer subdued lighting and often hide during the day, becoming active mainly at dusk or night. They are capable of using atmospheric air for breathing, rising to the surface for a gulp, so it is important to leave open water areas free of floating plants. Corydoras melanotaenia are not particularly demanding regarding water parameters; they adapt well to a wide range of pH and GH values, but still prefer a softer and more acidic environment. However, they are sensitive to pollution by organic waste, such as food remnants and excrement, which can lead to diseases and damage to their sensitive barbels. Therefore, it is necessary to regularly, at least once a month, clean the substrate of accumulated deposits. These catfishes are omnivorous and readily accept most popular foods. Natural foods such as fresh, frozen, or dry daphnia, bloodworms, Artemia, and other zooplankton will be an especially good choice.

Corydoras melanotaenia are omnivorous and readily accept most popular types of food. Natural foods such as fresh, frozen, or dry daphnia, bloodworms, Artemia, and other zooplankton will be an excellent choice. Under favorable conditions, this species often breeds successfully, but the catfishes show no parental care. To protect eggs and fry from predation by adult fish during breeding, a separate spawning tank is required. Detailed information on breeding Corydoras at home can be found in a separate article.

Under suitable conditions, Corydoras melanotaenia breed quite frequently. It should be noted that these catfishes do not exhibit parental care. For successful breeding, it is recommended to use a separate spawning tank to protect the eggs and fry from being eaten by adult fish. More detailed information on breeding Corydoras in home aquariums can be found in a specialized article. Sources: fishbase.org, seriouslyfish.com, scotcat.com

Fish are sensitive to water quality and substrate cleanliness. When kept in unsanitary conditions or on contaminated substrate, individuals often show erosion and damage to their barbels, which can lead to secondary bacterial infections. Prevention includes regular water changes, gravel vacuuming, and the use of soft sand to prevent injury to their delicate sensory organs.

When choosing, attention should be paid to the integrity of the fins and the absence of damage in the barbel area. Healthy individuals should be active, show interest in foraging for food in the substrate, and have no signs of emaciation or spots on the body. When purchasing, it is important to consider that fish feel most comfortable in a group, so it is recommended to acquire at least six individuals to reduce stress levels [seriouslyfish.com].