dwarf corydoras catfish, rare and timid freshwater species from acidic blackwater habitats, swim in planted freshwater nature

adult amazon america animal aqua aquatic balance barbel biological biotope bottomdweller callichthyidae captive care cat clear closeup conditions controlled cory corydoradinae corydoras decorative diversity easy eco eques fauna fin fish fishkeeping free freshwater gravel hardy instinct little low macro nano natural nature ornamental peaceful pet popular protection river south space stream swim tank underwater vulnerable water