Hardy Krüger said that he had only ever caught one fish in his life at the time of being cast in this film. It was a Tuna, the type of fish that the fishermen catch professionally in the movie.
The vessel "Velebit" was used for the clipper "Blue Fin". Other boats which appeared in the film included :"Hannibal"; "Bronwyn" (playing "Dog Star"); "Southern Condor"; "Origin:; "Anna Marguerite" and many others.
Many dummy plastic tuna fish made of polyurethane foam were used instead of real fish as the tuna run season had finished for the period of filming.
Bruce Beresford filmed additional footage after original shooting had ended. After principal photography had been completed, editor Rod Adamson, mindful of the post-production problems he had dealt with on the SAFC's "Sunday Too Far Away", said that the film would not cut together. Producer Matt Carroll recruited Bruce Beresford who had a 3 picture deal with the South Australian Film Corporation at the time and had recently completed "Money Movers" for the them. Beresford re-shot the major cabin sequence at the South Australian Film Corporations studios at Norwood. A double was used for Hardy Kruger who had gone back home to Germany. It did not matter as Kruger's character Bill Pascoe lies injured on the Blue Fin boat's cabin floor throughout this sequence.