RV Platessa tagged plaice were released off the Cumberland coast, using the RV "Platessa" during 1949 and 1950. In August 1951 echo-sounder traces were obtained over a wide area off Whitby by the RV 'Platessa', using a Marconi sounder. They were found to occur at a depth corresponding to that of a sharp thermocline, and small whiting about 3 in. in length, large Medusae, herring and sandeel larvæ were caught with a pelagic trawl at the depth of the trace. This work was reported in a ‘letter’ to the journal Nature in 1952. In 1950 the RV "Platessa" was involved in comparative
Ide (fish) of other cyprinids, but the larger adult fish form smaller single species groups which patrol what are believed to be regular routes. The ide prefers clear, warmer water and is not as tolerant of eutrophication as some related species. Ide spawn in running water and this means that the obstruction of rivers by dams and other man-made objects can negatively affect this fish. As an ornamental fish the ide is usually referred to as the orfe and the main variety kept is the golden orfe, which is golden or orange in colour with some black spots on its neck, near