The Blue Lagoon (novel)

Sometime later, Arthur's ship comes across the lifeboat and finds the three unconscious but still breathing. The arita branch is now bare save for one berry. Arthur asks, ``Are they dead?'' and the captain replies, ``No, sir. They are asleep.'' The ambiguous ending leaves it uncertain whether or not they can be revived.

Question: are they alive at the end of blue lagoon
Answer: yes