This record is an overview entry for biological data collected on Diamantina cruise Dm 1/61. This cruise took place in the Indian Ocean and the Great Australian Bight during 14 February to 10 March 1961, under the leadership of D. Rochford & D. Tranter. Biological data collected on this cruise include primary production rates from each 14 C station; organisms with/without chlorophyll, total particles and occurrence of diatoms and dinoflagellates from phytoplankton stations; pigment samples; and zooplankton biomass. Please note: This metadata record is a preliminary entry derived from information in the cruise report. Individual data types - which may span several cruises - will be indexed separately within this metadata system in due course.