Jonah is thrown into the sea, but he doesn't die. He is swallowed by a big fish and is there for three days and three nights.
Jonah was in the belly of the fish for three days and three nights, according to Jonah 1:17. In the New Testament, some of the leaders of the people ask Jesus for a sign. Jesus tells them that no sign will be given to them except the sign of the prophet Jonah, who was in the whale for three days and three nights. The New Testament takes this as a reference to Christ's three days and nights in the tomb.
17*But the Lord provided a large fish to swallow up Jonah; and Jonah was in the belly of the fish for three days and three nights.