Tategoi

Are the koi that  still processing their colors

Tategoi-Showa-3nov2001

Tategoi-Showa-3mar2002

Shusui

They are a partially scaled variety (doitsu), and the blue scales along the dorsal line should ideally be neatly aligned. The skin on the back where scales aren't present should be a pale sky blue.

Chagoi

Brown Koi from doitsu family