Jaco,
Yes very interesting. Although the fish looks almost pre-historic on a photo, it is quite attractive especially in full sunlight.
Pieter J
I will also take a guess:
Variety: Kawarimono......agreed
Kurasugoi somewhere in genes ..........agreed......Kumonryu
Doitsu Ogon somewhere....agreed.....metallic
I am not sure what to call it.
Will guess the first attempts to establish Kin Kikokuryu may have resembled this fish before patterns were established.
Maybe some other thoughts?