Jonah's 'whale' was never a whale, and he sulked when God forgave
The Hebrew text says Jonah was swallowed by a 'large fish', not a whale. And the real twist comes afterwards: when the city of Nineveh repents and is spared, the prophet is furious, complaining that he always knew God would be merciful. Many modern scholars read the book as fiction, possibly with a satirical edge.
The Book of Jonah is one of the twelve minor prophets. Its hero, a man of Gath-hepher who lived in Israel's northern kingdom in roughly the 8th century BCE, is ordered to condemn Nineveh, the Assyrian city near modern Mosul. He runs instead, sailing from Jaffa for Tarshish. A storm hits, lots point to Jonah, and the reluctant sailors finally throw him overboard. Swallowed by the fish, he prays for three days and nights until God has it spit him out.
Sent again, he walks through Nineveh announcing its downfall in forty days. The king orders fasting and sackcloth, even for livestock, and God relents. Jonah sits outside the city to watch; God grows a plant to shade him, then sends a worm to kill it. When Jonah rages over the plant, God asks why he should not care for a city of more than 120,000 people who cannot tell right hand from left.
Interpretations multiply. The book is read in full on Yom Kippur, and Jewish thought uses it to explore teshuva, repentance and forgiveness, and the tension between truth and mercy. Medieval rabbi Abraham ibn Ezra rejected a literal reading, while Isaac Abarbanel argued survival was easy, since foetuses live nine months without fresh air. A midrash has Jonah scaring off the Leviathan from inside the fish. In the Gospels Jesus calls himself greater than Jonah and cites 'the sign of Jonah', and early Christians saw the three days in the fish as foreshadowing the resurrection. In the Quran a surah bears his name, Yūnus.
Most scholars date the text long after the events, citing vocabulary shared with post-exile Aramaic sources, though the figure may draw on a real prophet named in 2 Kings. Seventeenth-century naturalists tried to identify the fish's species, while folklorists compare Jonah with Gilgamesh and Jason.
Source: Jonah