Blue Fin is a 1978 Australian family film directed by Carl Schultz and starring Hardy Krüger, Greg Rowe and Elspeth Ballantyne.

Based on the children's novel by South Australian author Colin Thiele, this is a father and son story about tuna fishing of Southern Blue Fin tuna in South Australia's Port Lincoln fishing district.

But when tragedy strikes the fishing boat during a deep sea fishing trek in the Southern Ocean, the boy is called on to become a man in a rites of sea passage to reconcile his past mishaps and save both his father and the ship from certain disaster.

The film is an unofficial follow up to Storm Boy (1976) with the same writer and star, also adapted from a Colin Thiele novel.

[4] Schultz was supportive of Beresford stepping in but was unhappy with the fact he supervised the final re-cut.