Ring of Bright Water is a 1969 British feature film starring Bill Travers and Virginia McKenna. It is a story about a Londoner and his pet otter living on the Scottish coast. The story is fictional, but is adapted from the 1960 autobiographical book of the same name by Gavin Maxwell. It featured the stars of Born Free, another movie about a close relationship between humans and a wild animal. The National Board of Review placed Ring of Bright Water on its list of the Top Ten Films for 1969. In 2005, The Daily Telegraph called it "one of the best-loved British films of all time."
(Summary from Wikipedia)