Conus algoensis, common name the algoa 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.
There are four subspecies :
The size of the shell varies between 12 mm and 60 mm. The thin shell is smooth,. It has a chestnut-brown color, with one or two bands of longitudinal white markings. The spire is articulated with white and brown.
This marine species occurs off the south coast of South Africa.