The most beautiful of Butterfly goldfish is in its large tail as butterfly. And its leading edge anti - warping degree level, directly determines the merits of the goldfish. General body and caudal fin leading edge side in 90 - degree angle to 45 degrees, fins near the end up to the gills and eyes are preferred. In addition to good shape, butterfly tail to tail fin spine bone strength requirements are higher. Good Butterfly tail, caudal fin when static must also be well opened, fin - end allows the flipped to the left, but not falling down, affecting the entire tail lines.

beautiful Gold fish with butterfly