Jesus cited “the sign of Jonah” as the sign of his divinity meaning that he viewed the story of Jonah as a foreshadowing of his own death and resurrection.
Hinduism actualy identifies "The Great Fish" as the One who saved Noah (Ma-Nu) from being dashed against Mt. Ararat in a storm during the period of the worldwide flood.
The Hindu Messiah returns several times, once as Shiva, another time as Krishna, and maybe other less well understood persons.
So, when you have Jesus drawing down on His infinite understanding and referring to Jonah, you've definitely got some theological problems on your hands.