noun
pencil fish
Refers to small freshwater fish of the genus Nannostomus, known for their slender, pencil-like shape. Used in aquarium contexts.
ペンシルフィッシュは細長い体が特徴的な熱帯魚です。
The pencil fish is a tropical fish characterized by its slender body.
水槽にペンシルフィッシュを数匹入れました。
I put a few pencil fish in the aquarium.