Asagi
A variant of Koi (Cyprinus rubrofuscus)

Representative Koiphoto — a dedicated image of this exact morph isn't available yet.
A blue-grey net-patterned back with red (hi) along the flanks and cheeks; considered one of the ancestral koi forms closest to the original colored carp. Prized for the clean blue reticulated scale pattern.
Keeper tips for this variant
Hard, alkaline water keeps the blue net crisp and the white belly clean — soft acidic ponds let the hi creep up over the back and muddy the prized blue reticulation.