rimmed- right along the edge of where it's cut. Due to mass breeding in warehouses to keep up with the demand, Veiltails and Crowntails are just kind of bred without real standard. As with my Bowser (in avatar) he is sold as a Crowntail and looks like a crowntail but you could argue that he is not, in fact, a crowntail bc of the combtail/halfmoon variety in the back tail.
Same with your fish, he is a veiltail but due to some freak genetics his tail doesn't droop. Moreover, the edge is cut or bitten, rather than natural there. :) No big deal! As long as it's treated.