Glaucus

Glaucus and Scylla by Bartholomeus Spranger

In Greek mythology, Glaucus (/ˈɡlɔːkəs/; Ancient Greek: Γλαῦκος, romanizedGlaûkos, lit.'glimmering') was a Greek prophetic sea-god, born mortal and turned immortal upon eating a magical herb. It was believed that he came to the rescue of sailors and fishermen in storms, having earlier earned a living from the sea himself.