Profundiconus teramachii, common name Teramachi's cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.

[1][2] Like all species within the genus Profundiconus, these cone snails are predatory and venomous.

They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.

This marine species occurs from Southeast Africa and the Philippines to Southern Japan, and off Queensland, Australia; also on the Tarava Seamounts off Tahiti.

Sometimes trawled in deep water on mud.