How do prawns breathe? Share with your friends Share 0 Nishi Dwivedi answered this Prawns breathe through gills. 1 View Full Answer Rooh Sareen answered this PRAWNS breathe through gills... 0 Parineeti Chopra answered this They have gills, like other big water crustaceans. Smaller don't need them because they're breathing through whole body.Thumbs up n howz u? 2