Sandy the Seal is a 1965 British family film directed by Robert Lynn and starring Heinz Drache, Marianne Koch and Gert Van den Bergh. Produced and cowritten by Harry Alan Towers, the film was shot in South Africa in Technicolor and Techniscope II with sequences shot on Seal Island, South Africa. The film was released in the UK by Tigon British Film Productions in 1969.
Source: Wikipedia