I think she got whacked by the net, the white patch looks like scales sheared off. The eye does look a bit poorly too, but could be trauma related.
That said, this barb also looks very thin, id be cautious and treat for internal parasites to be safe. If this one is affected, chances are they all are. Watch their poops and eating habits.
That said, this barb also looks very thin, id be cautious and treat for internal parasites to be safe. If this one is affected, chances are they all are. Watch their poops and eating habits.