| notonecta | (n) type genus of the Notonectidae: backswimmers, Syn. genus Notonecta |
| backswimmer | (n) predaceous aquatic insect that swims on its back and may inflict painful bites, Syn. Notonecta undulata |
| 松藻虫 | [まつもむし;マツモムシ, matsumomushi ; matsumomushi] (n) (uk) Notonecta triguttata (species of backswimmer) [Add to Longdo] |