To the untrained eye, ranchu goldfish look almost identical to lionheads, but there are a few distinguishing characteristics between them. Ranchu goldfish have a much more arched back, and the tail tucks in at a sharp point. The tail is always held at a 40 degree angle to the body. Ranchus were bred to resemble Japanese coins, so they have much more rounded bodies than lionheads that almost look “boxy”. Although some ranchus have wens, they are not nearly as prominent as lionheads, and some ranchus don’t have any head growths at all. Ranchus are also found in more colors than lionheads, including jet black.