water scorpion
US /ˈwɑː.t̬ɚ ˌskɔːr.pi.ən/
UK /ˈwɑː.t̬ɚ ˌskɔːr.pi.ən/

1.
ミズカマキリ
any of various predatory aquatic bugs (family Nepidae) that have a long breathing tube at the rear of the body and raptorial front legs
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The pond was home to several fascinating water scorpions.
その池にはいくつかの魅力的なミズカマキリが生息していた。
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A water scorpion uses its long breathing tube to get air from the surface.
ミズカマキリは長い呼吸管を使って水面から空気を取り込む。