i just bought two, what i thought were to be, zamora catfish from a local pet store, then later that week i went to buy a blue channel catfish and when i brought it home i noticed that these two fish looked EXACTLY alike which leads me to believe that they sold me the wrong fish either the first time or the second time.. I need to figure out if this is a Blue Catfish, or a Zamora catfish... Please help me figure this out

