Cross-barred Venus Clam
Phylum: Mollusca, Class: Bivalvia, Order: Venerida, Family: Veneridae, Genus: Chione, Species: Chione cancellata · Veneridae (Venus Clam family) · Bivalve, whole single valve, fan-shaped
Species
Chione cancellata
Shell Type
Bivalve, whole single valve, fan-shaped
Family
Veneridae (Venus Clam family)
Size
Approximately 1 inch (25 mm) in width, which is average for this species. Adults typically range from 0.75 to 1.5 inches.
Color & Pattern
Off-white to grayish base with faint brownish or purplish radial bands and a slightly weathered appearance. The colors are natural but slightly sun-bleached from wave action.
Rarity
Common, frequently found by beachcombers along suitable coastlines.
Habitat
Shallow marine waters, typically found buried in sand, mud, or seagrass beds in the intertidal and shallow subtidal zones.
Geographic Range
Western Atlantic, ranging from North Carolina through the Caribbean, the Gulf of Mexico, and down to Brazil.
Description
A sturdy, compact bivalve shell featuring a distinctly sculpted, grid-like or cancellate texture. This is created by prominent, raised concentric ridges intersecting with strong radial ribs. The margin is finely crenulated inside.
Key Features
Distinct grid-like pattern formed by deeply incised concentric lamellae crossing radial ribs, triangular overall shape, and a strong, interlocking hinge structure.
Collector Value
Low to moderate commercial value. While very popular among beginning and intermediate beachcombers for its striking texture, it is too common to command high prices among advanced collectors. Typically worth a few cents to a dollar as a specimen.
Condition Notes
Good condition. It is a single valve showing some minor edge wear and sun bleaching, but the sculptural grid remains sharp and clearly defined. Collectibility grade: Good.
Interesting Facts
Cross-barred Venus clams are filter feeders that use siphon tubes to draw in water and extract microscopic plankton. Their tightly locked ribbed valves provide excellent defense against shell-crushing predators like crabs and rays.
Ecological Role
Serves as an important prey item for various marine predators including carnivorous snails, crabs, and fish. As filter feeders, they help clarify coastal waters by consuming suspended organic matter.
Similar Species
Chione elevata (Florida Venus), which tends to have sharper, more elevated concentric lamellae, and Anomalocardia brasiliana, which has different ribbing profiles.
Beach Finding Tips
Look along sandy or shelly ocean beaches after a storm or high tide. Sifting through shell lines left at the high-tide mark often reveals intact single valves.