Thanks guys.
I posted somewhere else (PlanetCatfish I think) and they all figured it was a eupterus juvie. If so, that would be sad in that I really like the pattern now and not so much the adult pattern.
But, these are only 1" or maybe a bit more, so I'll let them keep growing out in my 75 with other oddballs and catfish and we'll see what happens. If they get too big, featherfins/eupterus are not too hard to find homes for.