This record describes the datasets obtained on Courageous Cruise 025. The data were obtained from the NSW coast between Cape Howe and Jervis Bay in October 1977. Data were obtained from acoustic and trawl surveys of Jack mackerel (Trachurus declivis) and other demersal and pelagic fish. Year class, length and target signal strength were determined. XBT and surface water samples from an oceanic eddy were also taken. Additional information regarding this dataset is contained in the cruise summary for this voyage.(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).