Jonah was swallowed by a great fish in the Old Testament story.

It was translated as whale in the New Testament when Jesus said that the proof of Him being who He said He was would be that, just as Jonah was in the whale's belly for three days and three nights, He would be in the grave for three days and nights. This is actually how we know that the Pope lied to us when he had us celebrating "Good Friday" when the crucifixion actually happened two days before that on Wednesday.

That might be more than you wanted to know, but I have to put the truth out there every once in a while.