Oliva australis (also known as the Southern olive or Olive shell) is a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives.
This species has a shiny pale elongated shell that is usually decorated by purple zigzag longitudinal lines and altering brown and white markings around the top of the whorls. They can be 3 centimeters in length.
This marine species was found in the Atlantic Ocean off the islands Saint Pierre and Miquelon.