Arez in Persian mythology, is one of the six mighty fish spirits (agathodemons in fish forms) which Ormuzd created as protecting spirits of the tree of life, Gorgad, which stands in the Ferakhand sea, against the monster which Ahriman created. The latter has the appearance of a frightfully large turtle. It seeks to gnaw at the tree and to swallow the fish. Arez is the lifegiving principle of the water, therefore figuratively father of the aquatic beings. Arezn is also called king of all people of the sea.