And the LORD appointed a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights.Jonah 1:17
Just like God sent the storm, he sends a fish. Bizarre, yes, but the God who created the universe can control the physical elements for our good and His glory.
God is not finished with Jonah, He is still pursuing him - the storm was God’s grace, the fish was Gods grace, the 3 days/nights spent in there is God’s grace.
God could have made Jonah float or saved him another way, He could have made the fish take him straight to the land. Why 3 days/nights? It seems like Jonah needed that time to repent! He wasn’t repentent when he was being thrown into the sea, he wasn't crying out to God at that stage, he was asking to die.
God is in control over everything around us. And he uses his creation to extend love towards us