Nihonia australis, commonly named the Australian turrid, is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.

The elongate-fusiform shell is yellowish white, encircled by raised, corded orange-brown ribs, with several intermediate striae.

The outer lip is broadly rounded above into the rather shallow sinus.

The long, straight siphonal canal is unnotched.

[2][3] This marine species occurs off Japan and Australia.