water bug

US /ˈwɑː.t̬ɚ ˌbʌɡ/
UK /ˈwɑː.t̬ɚ ˌbʌɡ/
"water bug" picture
1.

chinche de agua, insecto acuático

any of various insects that live in or on water, especially a large aquatic bug (family Belostomatidae) that can inflict a painful bite

:
I saw a large water bug swimming in the pond.
Vi un gran chinche de agua nadando en el estanque.
Some people confuse cockroaches with water bugs.
Algunas personas confunden las cucarachas con los chinches de agua.