Plebidonax deltoides 三角斧蛤
（重定向自Donax deltoides）
Plebidonax deltoides (previously Donax deltoides) is a small, edible saltwater clam or marine bivalve mollusc of the family Donacidae, endemic to Australia. It is most widely known as the pipi in the eastern states of its native Australia, and as the Goolwa cockle or Coorong cockle in South Australia; in south-eastern Queensland, it is often also known as eugarie or (y)ugari, a borrowing from the local Yugarabul language.