"And in the end days the unbelievers will be shown the sign of Jonas" (the fish).
According to the book 'The Demon Code' written by Adam Blake, Jonah (or Jonas) has a different story and even wrote some of his own end time prophecies.
There is an interesting correlation between the book and the text from this website further down.
The website mentions that Jonas was the 5th of the 12 minor prophets.
And in the book 'The Demon Code' it stated that he was part of the 5th Monarchy and died in 1660. He was giving warning about the year 1666
Excerpt from website
http://www.aboutbibleprophecy.com/p32.htm.
Jonah (or Jonas)
Go to People in the Bible or Women in the Bible
Jonah, the son of Amittai, was born in Israel. He was called by God to preach repentance to Assyria, of which the capital city was Nineveh. However, Jonah rebelled.
Jonah didn't want to preach to the pagans of Assyria. So, Jonah tried to escape God's plan by fleeing on a ship. But Jonah was thrown overboard and swallowed by a great fish. Later, the fish spit him out on the shoreline. Then, finally, Jonah obeyed God's command and went to Nineveh to preach. His preaching was successful and 120,000 people in Nineveh turned to God in obedience, sparing themselves punishment from God.
Jonah's time inside the fish is used as an example of Jesus' burial in Matthew 12:38-41. The basic theme of Jonah is that God declares His love for all men, whether they are Israelites or not. Jonah was unable to love the Assyrians properly, but God desired nothing for them but their salvation, and so He sent a prophet to preach repentance.
Proof of the accuracy of Bible prophecy
See how the Bible accurately predicted the history of the Holy Land, the future of the world, the fall of empires and the rise of a Messiah.
Jonah, means "dove". The Bible's book of Jonah is the 5th of the twelve minor prophets. Unlike the other prophet books, Jonah's is not a collection of prophetic speeches, but a short narrative.