feeder fish

plural plural-only

Certain types of inexpensive fish commonly fed as live prey to captive animals, such as sharks and turtles.

Japanese Meaning

飼育下の動物、特にサメやウミガメなどに生き餌として与えられる、通常は安価な魚。

The aquarium manager warned that feeder fish can carry parasites if not quarantined properly.

水族館の管理者は、エサ用の小魚が適切に検疫されていないと寄生虫を持ち込む可能性があると警告した。

Sense（1）

Certain types of inexpensive fish commonly fed as live prey to captive animals, such as sharks and turtles.