noun
mosquitofish; gambusia
Refers to the fish Gambusia affinis, introduced for mosquito control. The name literally means 'mosquito killer'.
カダヤシはボウフラを食べることで知られている。
Mosquitofish are known for eating mosquito larvae.
池にカダヤシを放して蚊の発生を抑えた。
They released mosquitofish into the pond to control mosquito breeding.
From 蚊 (ka, 'mosquito') + 絶やす (tayasu, 'to exterminate'), literally 'mosquito exterminator'. The katakana spelling カダヤシ is standard for the fish name.