Jonah, a parable?

Some scholars say Jonah’s fish tale was a fish tale, not fact. Unlike most prophecies, there’s just one prophecy in Jonah—and it doesn’t come true. Also the style of writing with its jarring conclusion, which leaves the readers scratching their head, resembles some of Jesus’ parables—fictional stories with a message. 100 Tough Questions About God and the Bible, p. 139.