Ranchu Goldfish
The Ranchu Goldfish is perfect for ponds as it is most striking when seen from above. The Ranchu Goldfish is very similar looking to the Lionhead Goldfish, however the posterior dorsal contour is more curved on the Ranchu Goldfish.
Another distinguishing feature that separates them is the tail, which on the Ranchu is splayed sideways with lower lobes sometimes being located nearly horizontal.