Conus reductaspiralis, common name Nielsen's cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Like all species within the genus Conus, these snails are predatory and venomous. They are capable of stinging humans, therefore live ones should be handled carefully or not at all.
Additional information regarding this species:
The size of the shell varies between 27 mm and 51 mm.
This marine species is endemic to Australia and occurs off Western Australia.