noun
low-grade fish; cheap fish
Refers to fish of inferior quality or low market value, often used in contrast with 上魚 (high-grade fish).
この店では下魚を安く売っている。
This shop sells low-grade fish cheaply.
下魚でも料理次第で美味しくなる。
Even cheap fish can be delicious depending on how you cook it.
上魚 means high-grade or expensive fish, the opposite of 下魚.
Compound of 下 (ge, 'low') and 魚 (sakana, 'fish'). The reading げざかな follows standard rendaku voicing.