Polinices mammilla is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails.

[1][2] Pure white shells, rather elongated in shape, up to 4 cm; chestnut-brown, horny operculum.

This species occurs in the Red Sea and in the Indian Ocean off Kenya, Madagascar, Mauritius, Tanzania, Transkei and is also found in the Central Indo-Pacific Ocean and in the west Pacific Ocean off Papua New Guinea and Australia.

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