This record describes the datasets obtained on Courageous Cruise 052. The data were obtained from the Australian North West Shelf in July 1979. Trawls for demersal fish were made over two 48 hour periods and the species studied included Perons threadfin bream (Nemipterus peronii), Brush-tooth Lizard (Saurida undosquamis), Lesser spangled emperor (Lethrinus choerorhynchus), Saddletailed sea perch (Lutjanus malabaricus), Red big eye (Priacanthus macrocanthus) and Painted sweetlip (Plectorhynchus pictus). Length, sex, numbers and age were determined. Temperature observations from an XBT were also obtained.(derived from the cruise report) - Biological Field Data Sheets recorded during this voyage have been scanned to PDF, and are available (to CSIRO Staff) on-line. See the details link under "Stored Media List" (below).