I commented on this fish in a thread a short while back, here's a copy:
There are two very close species, Leprinus affinis and Leporinus fasciatus fasciatus. At first glance they appear identical, but the former has nine instead of ten cross bands and the caudal fin has rounded tips; also, the throat of L. fasciatus fasciatus is brick red in colour. L. affinis grows to 10 inches, the other to 12 inches. They need at least a 4-foot tank.
Both are avid plant eaters, so don't have them in a planted tank unless you want all the plants to be eaten in short order.
L. fasciatus fasciatus is a fin nipper of its own species, but otherwise considered peaceful. A couple of other things I came across, they are good jumpers so the tank must be covered at all times. And, they have been known to take delight in sneaking up and fin nipping slower fish, so not good company for sedate fish. There are four, possibly five, sub-species.