KnowraNotonectidaeLinked fromLinked fromThe 3 pages that link to Notonectidae, each with the reason it gives.All 3Broader topic 1Compared with 2CorixidaeCompared with: Backswimmers resemble water boatmen but differ in posture and often prey on other animals.NepomorphaBroader topic: Its inverted swimming posture is a conspicuous nepomorphan specialization.RanatraCompared with: Backswimmers actively paddle through open water, unlike Ranatra's frequent stillness among vegetation.