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.

[2] This species is widespread in the tropical Indo-Pacific (Red Sea, Kenya, Madagascar, Mozambique, Tanzania and Western India).

Cutting edge of rachidian has large, triangular, pointed main cusp, flanked on either side by two, sometimes three, blunt, very small denticles.

Marginal teeth is with wide shafts, narrow bases, and curved, hooked, blade-like apices bearing long pointed tips.

[2] However, Cerithium caeruleum is larger, less pupiform, lacks the whorl sculpture of three tightly beaded spiral cords, and is distinctly more angulate in outline than Clypeomorus petrosa gennesi.

Reproductive studies and growth statistics calculated by Ayal and Safriel provide evidence that this species lives from 90 to 120 days in the plankton and has a seven-year life history.

Taylor and Reid found the muricid, Muricodrupa funiculus, to be the major predator of adult populations in the Sudanese Red Sea.

[2] This species usually occurs in large populations on intertidal rocky shelfs with a thin covering of sediment and is frequently mentioned in ecological studies.

Chelazzi and Vannini documented its vertical zonation and algal associations on intertidal rocky platforms in southern Somalia.

[6][3] A comprehensive account of the ecology of C. caeruleum occurs in Ayal and Safriel, who studied cerithiid habitats in the Sinai peninsula, Red Sea.

They recorded that C. caeruleum lived to the lee of wide platforms in solution basins and tidal pools on surfaces covered with sediment, and was very active during ebbs, but aggregated or burrowed during flows.

[2] This species is confined to the continental margins of the western Indian Ocean where it is found as far south as Natal and Madagascar.

It also occurs on Aldabra Atoll and in the Red Sea and Persian Gulf, extending eastward to the coasts of Pakistan and western India.