These are some of the original corys. Although the petstore sold me these as Corydoras aeneus, I'm pretty sure that these three are not C. aeneus. The fourth member of the group probably is C. aeneus. While C. aeneus has a pretty even greenish bronze colour, these fish have distinct stripes and a mottled pattern above the stripes. Whatever their species (and I have come up with a few candidates online), they're really cool fish. The next question would be whether I could get them to breed. I'd probably have to give them much softer water, for starters.