It looks like he is. The easiest way I know to tell them from the dwarfs is ACF don't have webbed hands and the dwarfs do. Also if he was a dwarf your other frog would probably have eaten him by now because they are so much smaller. I have 6 ACFs and their size varies quite a bit, the biggest is probably twice the size of the smallest. They seem to get along fine even with the size difference.