EuphemosEuphemus

The son of Poseidon (lord of the Sea) who could run across the sea with only his toes touching the waves; he was one of the Argonauts.

After obtaining the Golden Fleece, the Argonauts were stranded in Libya and were forced to carry their ship, the Argo, across the desert; when they came to lake Trito, they set up a tripod as a tribute to Apollon and prayed for guidance; from the waters of the lake arose another son of Poseidon, Triton; the half-man, half-fish shaped god, Triton, gave Euphemos a clod of earth as a gift and showed the Argonauts the passage that would take them back to the sea.

Several nights later, Euphemos had a divinely inspired dream about the clod of earth that Triton had given him; he took the clod and threw it into the sea and an island emerged from the depths of the sea.

• Argonautika, book 1, lines 179-184 and 1755-1764