Brochis ambiacus

Remarks: Brochis ambiacus was one of the first 10 species of Corydoradinae to be described. They were originally named Corydoras ambiacus after being found in the Rio Ambyiacu in 1872. Since then, they have been found in many other locations throughout the upper Amazon and have been known under many names such as Corydoras grafi, Corydoras longirostris, and Corydoras melanistius. They were given their most recent name, Brochis ambiacus, upon publication of a phylogenomic analysis in 2024 that reclassified many species in the Corydoradinae subfamily. Due to their similar markings, Brochis ambiacus are often confused for B. agassizii. Both species have tan or silver bodies covered in black or dark grey spots, a black blotch at the base of the dorsal fin, and a black or dark grey "mask" going over the eyes. What is often used to differentiate the two is the size of the spots on the body. B. ambiacus have smaller, less uniform spots compared to the larger, more orderly spots of B. agassizii. While Brochis ambiacus has been known to be a very hardy and adaptable species of Corydoradinae, many have found breeding them to be a challenge. They have proven to be difficult to convince to spawn, requiring just the right conditions that perfectly mimic the rainy season in their native range. If spawning is achieved, the fry are known to be far less forgiving than the adult fish. To combat this, ensure fry are kept in pristine water parameters and have constant access to high quality foods. Corydoradinae are small, peaceful catfish that are active shoalers and will stay near conspecifics, making for a lovely sight. They feed by searching through sand with their barbels, making such a substrate necessary for their long-term health. Gravel substrates tend to be abrasive and damage the barbels, leading to infections and an inability to find food. While these friendly catfish are willing to swim with other species of Corydoradinae different from their own, this does not provide the same social need as being kept with members of their own species. Because of this, it is highly recommended to keep at least six of each species of Corydoradinae present in the aquarium and only mix species if one has the space to keep at least six of each. Corydoradinae are often looked at as "scavengers," but they should be treated in a similar fashion as the rest of your fish. They are omnivores and require a mixed diet. Sinking prepared foods are readily accepted, as are frozen and live foods such as brine shrimp, blackworms, and bloodworms.