The only sign given in Matthew 12:39

What is the significance of Jonah's last words that made the large fish spit Jonah out? Why a fish? How does Jonah tie into what Jesus said to the Scribes, Pharisees, Sadducees and multitudes?

These answers are in this video and there will be a second follow up because time ran short.
Here is a website that will allow you to look up words and their original Ancient Hebrew and Ancient Greek below is the original root word for "Truth" in the New Testament and it will show why "Truth" is the "Hidden Alpha"

https://www.blueletterbible.org/lexicon/g227/kjv/tr/0-1/