Proteus
Proteus knew all things but only spoke if held through shape-shifts.
The Myth of Proteus
Proteus was an ancient sea god who served Poseidon as keeper of the seals on the island of Pharos near Egypt. He possessed the gift of prophecy and perfect knowledge of past, present, and future — but would only share it with those strong enough to hold him. When grasped, he shifted through terrifying forms: lion, serpent, leopard, boar, water, tree, and fire. Menelaus, stranded after the Trojan War and desperate to reach Sparta, wrestled Proteus on the advice of the sea nymph Eidothea. Heracles also sought his wisdom. Proteus eventually yielded and told Menelaus how to appease the gods and sail home. His name gave us "protean" — endlessly changeable.
Parents
Oceanus and Tethys
Children
Eidothea
Symbols
Fun Fact
"Protein" was named after this god in 1838.
Words We Inherited
English words and phrases that trace back to this myth. See our full guide to English words from Greek mythology.
Explore Further
Glaucus
⚡ godsea, prophecy
A mortal fisherman who became an immortal sea god after eating a magical herb.
Nereus
⚡ godThe Old Man of the Sea
Nereus was the ancient, benevolent sea god known as the Old Man of the Sea — truthful, wise, gentle, and father of the fifty Nereids.
Glaucus the Sea God
⚡ godsea
Mortal fisherman who ate a magical herb, became immortal, and transformed into a blue-green sea deity.
Poseidon
⚡ godGod of the sea, earthquakes, and horses
Poseidon was the god of the sea and earthquakes whose moods determined whether sailors lived or died — and whose grudge against Odysseus drove the Odyssey.
Leucothea
⚡ godsea, rescue
Sea goddess who rescued drowning sailors, formerly the mortal princess Ino.
Amphitrite
⚡ godGoddess-queen of the seas
Amphitrite co-ruled the oceans with Poseidon.
Glaucus of Anthedon
🐉 creaturesea,transformation
A mortal fisherman who accidentally ate a magical herb and was transformed into an immortal sea deity, growing fish's scales and a tail, destined to roam the seas forever.
Periclymenos
🗡 heroShape-shifting, combat
Grandson of Poseidon who could change shape at will and sailed with the Argonauts
Thaumas
🏔 titanSea Wonders, Marvels
An ancient sea god whose name meant "wonder," father of the rainbow goddess Iris and the storm-bringing Harpies.
Euphemus
🗡 herosea
Argonaut and son of Poseidon who could walk on water and was prophesied to be the ancestor of Cyrene's founders.
Tritons
🐉 creaturesea, marine
Fish-tailed sea spirits who attended Poseidon and blew conch shells to calm or stir the waves, led by the original Triton, son of Poseidon.
Protean
💭 conceptLanguage and adaptability
An English adjective meaning versatile, adaptable, or constantly changing in form, derived from the sea god Proteus who could transform himself into any shape to avoid capture