No way to tell at that size really. You can try asking the source of the fish from your LFS & see what kind of info they will offer up, but that's about the best you can do.
They are meant to be shop bred f o imported fish. It's a good shop with a good rep, Asian guy who is known for Importing good quality discus and goldfish.
I will be setting up a new tank soon and these are on the list of possibilities but not,sure,yet.
Just out of,curiosity do you like them anyway? As I said they are a nice looking natural type,angel regardless of what they actually are.




