hey that's exactly what mine look like that I just got on thursday, except my one with no mask has spots instead of squiggles, all of mine were sold to me as Julii's but I don't think that any of them really are... I tell my g/f that the one with no mask is, just b/c her name is Julie and I thought it was cute that I had Julii corys, though really I think the one with no mask is corydora tri-something or other. NO clue what the two with the masks and spots are, defintely not melanistius or whatever b/c the spots go all the way down the back fin, where melanistius the spots stop at the end of the body, but it's not agassizzi because the spots aren't quite as big and they are more in a line then the agassizzi's are... I dunno this whole what kinda cory thing is confusing.