A Sicilian shepherd, the son of Pan and Symaethis. He fell in love with Galatea, who was also passionately loved by Polyphemus, a Cyclops. However, she had her heart set on Acis and the giant, in a fit of jealousy, crushed his rival beneath a rock. The shepherd's blood turned into the River Acis (or Acinius) at the foot of Mount Etna on Sicily.
The story does not appear elsewhere and is perhaps no more than fiction suggested by the manner in which the little river springs from under a rock.
- Ovid. Metamorphoses xiii, 750 ff.
- Smith, William. (1870). Dictionary of Greek and Roman Biography and Mythology. London: Taylor, Walton, and Maberly.