Home > Invertebrates > Shells > Horns > Cerithium placidum

Updated 10/15/2025

Family Cerithiidae

ASIAN PACIFIC / HAWAII

Cerithium placidum



Makapuu tidepool, Oahu

PLACID HORN

Uncommon on shallow reefs.  Thin with inflated whorls and fine granulose spirals.  Attains 0.7 inch, 18 mm.  South China Sea to Hawaii.