Kinbuna: Carassius buergeri subsp.1. (Chiba pref)
Number of Dorsal Fin Comptotrichia = 11 or 12. It must be a Kinbuna.
Kinbuna babies / Carassius buergeri subsp.1. (Chiba pref)
Kinbuna Mat & Half Mat scale type / Carassius buergeri subsp.1. (Saitama pref)
Kinbuna SP
It looks Golden as the Name in this video though Not so bright color in dark place.
from Yamagata pref. Carassius buergeri subsp.1. SP.
or Carassius auratus subsp.1(?)
or Carassius auratus subsp.2(?)
Kinbuna Mat Scale type
Carassius buergeri subsp. 1 ver Mat scale. It's not a Goldfish.
Kibuna Mat scale type part2
Carassius buergeri subsp. 1.