Nereus is the righteous and all-wise "old man of the sea", god of the Mediterranean Sea, son of Gaia and Pontus. His wife is Doris and she became by him the mother of the fifty Nereids, friendly sea-nymps. Nereus is a gentle and very wise old man who has the power to foretell the future, but he will not answer questions unless he was caught and to avoid that he would change his shape (such as when Heracles came to ask him the way to the Garden of the Hesperides). The domain of Nereus and his fifty daughters is especially he Aegean Sea where he has saved many ships from destruction.