Film shows underwater workings of trawling nets. Fishing boat with net being pulled in. Catch of fish. Study of how nets behave carried out in seas off Malta on the Sir Lancelot. Diver with underwater camera. Action of different nets, described in detail. Ministry of Agriculture, Fisheries and Food Made by the Fisheries Laboratory, Lowestoft Produced by Basic Films Scientific Supervisor A R Margetts Underwater photography J H Hodges Frogman J D Graham Editor J B Napier-Bell