Cabestana spengleri, or Spengler's trumpet, is a large predatory sea snail, sometimes called a predatory whelk, a marine gastropod mollusc in the family Cymatiidae.

[1] This species is named after the Danish naturalist Lorenz Spengler.

The length of the shell attains 153 mm.

This marine species occurs off New Zealand (Chatham Island, Kermadec Islands) and Australia (New South Wales, Queensland, South Australia, Tasmania, Victoria, Western Australia).

Edible: sold in fish shops in New South Wales, Australia.