Corydoras robinae

Corydoras robinae, commonly known as Robine's Cory or the Flagtail Corydoras, is an engaging and energetic benthic species originating from the river systems of South America. In their natural habitat, they are often found in tributaries and streams with a noticeable current, typically over sandy bottoms littered with leaf litter and driftwood. Replicating this environment is key to their long-term health in captivity. An aquarium for this species should feature a fine, non-abrasive sand substrate to protect their sensitive barbels, which are vital sensory organs used for locating food. Sharp gravel can cause erosion and infection, hindering their ability to forage. The inclusion of driftwood, catappa leaves, and other botanicals will not only provide hiding places and a sense of security but also encourage the growth of beneficial biofilms, which they enjoy grazing on. While they are adaptable to a range of water parameters, they thrive in clean, well-oxygenated water with some gentle circulation to mimic their native streams. Stability is more important than chasing exact numbers, so a mature, well-established filtration system and a consistent water change schedule are paramount.

As a highly social and active species, they must be kept in groups. A solitary individual will be stressed, shy, and prone to poor health. A larger school will display more confidence and natural foraging and shoaling behaviors, creating a dynamic display as they move in a coordinated fashion across the tank bottom. Their 'fast swimmer' characteristic is most apparent when they are comfortable in a group. Diet is a critical aspect of their care. Being omnivores, they require a varied diet consisting of a high-quality sinking pellet or wafer as a staple. This should be supplemented multiple times a week with frozen or live foods such as bloodworms, daphnia, brine shrimp, and tubifex worms to ensure a complete nutritional profile. One of their most interesting traits is their ability to breathe atmospheric air. They possess a modified, highly vascularized intestine that allows them to absorb oxygen from gulps of air taken at the surface. This is a supplementary adaptation for surviving in low-oxygen conditions and is not a substitute for proper tank aeration. Due to their small size and peaceful nature, they are ideal for community tanks, but tank mates should be chosen with care to avoid any fish large or aggressive enough to view them as food.