Top two are RES for sure, bottom two are GSF for sure...
My thoughts exactly. Here is the story, my mother law got me a gift cerificate for Christmas from our local farm and garden stores so I could put some additional fish in my new pond. I ordered 50 RES and picked them up this morning. Only 19 of them were RES, the rest were pure GSF and I am pretty sure the guys on the fish truck knew exactly what they gave me.

I did make it back to the store before the truck took off and exchanged them. I still ended up with two GSF when I got back. Thankfully only the fish I was sure were RES went into the pond, the rest went into my RAS tank with the SMB fingerlings that I am pellet training.