The Marm is looking good. If I am understanding you got these from lilfats. He just got them from Rapps. Would be nice to know what variant they are, all I could get out of Rapps is they were shipped from Santarem, no collection locale. Definitely not Trombeta or Rio Tapajos.
From that pic looks like maybe Rio Xingu variant, but can't tell till they get larger.
Nice pickup and definitely watch the the aggro between them. Not only from the marms but also from the Jo. I have an 11 inch Jo that is a pike killer period!