Went back to LFS for more cories b/c the 3 i got seem a bit lost in the large tank and I lost one to pre amture death. All three I bought today were in the same "spotted cory" tank that I got the other 3 from. However, 1 had slightly different markings, but I decided to keep him anyway to experiment for myself. Sure enough, the 4 cories of the same species are inseperable and the one diff. is on his own. If it doesnt change I will get him a bro. My next stop on the internet is to see exactly what kind of cories I got!!!