Corydoras pygmaeus. These tiniest of Cory cats are great for small aquaria and can be kept with tiny fish including baby shrimps. Even more so than other cories, we stress the importance of keeping these shy fish in schools. 5-6 should be the bare minimum number of these fish that you keep, with 8-10+ being better. The more the merrier!
These are subadult specimens, around 1" long.