Cerithium zonatum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae. It is commonly known as the “zoned cerith” or “zoned cerith snail.” This species is characterized by its distinctive zonation patterns on the shell and its relatively small size.
Description and Characteristics
The shell of Cerithium zonatum is typically elongated and conical, reaching a maximum size of about 30 millimeters. It exhibits a distinctive spiral pattern of dark brown and white bands or zones, giving it its common name. The aperture (opening) of the shell is oval and slightly angled, with a prominent outer lip. The shell surface is often covered in fine, raised lines or ridges.
Habitat and Occurrence
Cerithium zonatum is a common species found in intertidal and shallow subtidal zones of tropical and subtropical regions worldwide. It primarily inhabits rocky shores, coral reefs, and seagrass beds, often in areas with a high density of algae. This species is typically found at depths ranging from the intertidal zone to approximately 50 meters.
Taxonomy
Cerithium zonatum belongs to the Class: Gastropoda, Order: Caenogastropoda incertae sedis, and Family: Cerithiidae. This classification places it within a group of marine snails known for their diverse shapes and sizes. The family Cerithiidae is particularly known for its members’ elongated, conical shells and the presence of a characteristic operculum, a small, hard plate that closes the opening of the shell.
Feeding
Cerithium zonatum is an herbivorous species that feeds primarily on algae, detritus, and other organic matter. It utilizes its radula, a ribbon-like structure with rows of teeth, to scrape and rasp food from surfaces. The snail’s diet contributes to the important role it plays in marine ecosystems by helping to regulate the growth of algae and maintain the balance of the food web.
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