Dog Whelk or Ribbed Pacific Cerith
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cerithiidae, Genus: Cerithium, Species: Cerithium vulgatum · Cerithiidae (Cerith family) · Gastropod (spiral univalve)
Species
Cerithium vulgatum or similar cerith/whelk species
Shell Type
Gastropod (spiral univalve)
Family
Cerithiidae (Cerith family)
Size
Approximately 1 to 1.5 inches, which is average for this species group. Adults typically range from 0.75 to 2 inches.
Color & Pattern
Mottled brown, grey, and cream coloration with alternating darker bands and textured nodes running along the elongated spire.
Rarity
Common
Habitat
Shallow intertidal zones, rocky shores, mudflats, and seagrass beds in marine environments.
Geographic Range
Widely distributed across temperate and tropical coastal waters worldwide, depending on the exact species.
Description
An elongated, high-spired gastropod shell featuring multiple whorls ornamented with distinctive beaded ridges and nodes. The aperture is typically small and oval-shaped with a short anterior canal.
Key Features
High elongated spire, heavily sculpted spiral ribs and beads, small oval aperture with a subtle canal.
Collector Value
Low to moderate commercial value, frequently collected by casual beachcombers rather than specialized conchologists.
Condition Notes
Appears to be a complete, whole shell in good condition with natural coloration largely intact, graded as Good to Fine.
Interesting Facts
Ceriths are prominent grazing snails that play a major role in controlling microalgae populations in intertidal zones.
Ecological Role
Functions as an essential primary consumer and algae grazer in shallow marine food webs, serving as prey for larger carnivorous snails and crabs.
Similar Species
Other members of the Cerithiidae family and small turrid snails, distinguished mainly by finer sculptural details and aperture shape.
Beach Finding Tips
Look along rocky intertidal pools or sandy flats at low tide, particularly where seaweed and shell debris accumulate.