Conus omaria, common name the Omaria 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.

The variety Conus omaria var. marmoricolor Melvill, 1900 is a synonym of Conus pennaceus Born, 1778.

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