Cerithium caeruleum

Species of gastropod

Cerithium caeruleum, the Cerith sand snail, is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae. It is generally found in large populations on intertidal rocky shores with a thin layer of sediments. They have large and solid shells, and their radula ribbon robust long about one-fifth the shell length. This species lives in the planktonic stage from 90 to 120 days and has a seven-year life history. This common intertidal species is confined to east Africa, Madagascar, and the Arabian Peninsula and is unlikely to be confused with any other Cerithium species. It is distinguished by its squat, knobby shape; and as indicated by its name, caeruleum, a grayish blue color with spiral rows of black tubercles.

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