Unfortunately these are all hybrids. I bought a group of them from the same source labeled as Melanurum and grew them out to a decent size.
They all had different coloring, black markings and some slight head shape differences as well. Not surprising they grew hyper fast. Very colorful fish, but a mix of most likely Synspilum and Bifasciatum. The supplier got them in small and probably didn't know any better then what the were sold as (At least I hope) Although he has a pretty iffy reputation here in Oregon, depending on who you talk to. You wont be disappointed if you want a colorful active fish.