Cockle Shell (also commonly known as Heart Cockle)
Phylum: Mollusca, Class: Bivalvia, Order: Cardiida, Family: Cardiidae, Genus: Vasticardium, Species: Vasticardium asiaticum · Cardiidae (Cockle family) · Bivalve (two-shelled), whole single valve, fan/heart-shaped
Species
Vasticardium asiaticum
Shell Type
Bivalve (two-shelled), whole single valve, fan/heart-shaped
Family
Cardiidae (Cockle family)
Size
Approximately 1.5 to 2 inches in width, which is average for this species. Adult specimens typically range from 1 to 3 inches.
Color & Pattern
The exterior exhibits a metallic golden-yellow coloration with visible shimmer, which appears to be a craft or decorative application rather than natural shell coloration (likely spray-painted or glittered). Beneath the artificial coating, the natural shell has radial ribs typical of the species.
Rarity
Very Common in its natural habitat, though modified/painted specimens like this are novelty craft items.
Habitat
Shallow marine waters, typically found buried just beneath the surface of clean sand or mudflats in the intertidal to shallow subtidal zones.
Geographic Range
Indo-Pacific region, spanning from the Red Sea and East Africa across the Indian Ocean to Southeast Asia and the Western Pacific.
Description
A sturdy, symmetrical bivalve shell featuring prominent, deeply impressed radial ribs and a rounded, heart-shaped profile when viewed from the side. The margin is strongly crenulated to interlock tightly with the opposing valve.
Key Features
Distinctive radial ribs radiating from the umbo (beak) to the margin, strong asymmetrical heart-like side profile when paired, and a strongly toothed or crenulated inner margin.
Collector Value
Low collectible value for serious conchologists due to the artificial painting/modification, though common as a decorative beach craft item.
Condition Notes
Fair to Good structural condition of the underlying shell, but heavily altered for decorative purposes with a non-natural gold metallic finish covering the exterior.
Interesting Facts
Cockles are capable of leaping or jumping using their strong, muscular foot to escape predators such as starfish and carnivorous snails.
Ecological Role
Filter feeders that help maintain water clarity by consuming suspended phytoplankton and organic particles, serving as an important prey base for fish, rays, and shorebirds.
Similar Species
Acanthocardia tuberculata (European edible cockle) and Trachycardium egmontianum (Prickly cockle), distinguished by spine development on the ribs and geographic origin.
Beach Finding Tips
Look along sandy intertidal zones at low tide; search for small V-shaped siphonal holes in the sand or sift through shell drift lines after storms.