cold-season koi carp
Refers specifically to koi carp caught during the cold season, when the flesh is considered firmer and tastier. A seasonal culinary and cultural term.
See also: 鯉
Cold-season koi carp caught in winter are rich in fat and delicious.
Compound of 寒 (kan, 'cold') and 鯉 (goi, 'koi carp'). The reading ごい is a rendaku form of こい.