Jingle Shell (Common Atlantic Jingle, Mermaid's Toenail, Saddle Oyster)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Anomiidae, Genus: Anomia, Species: Anomia simplex · Anomiidae (Jingle Shell family) · Bivalve (two-shelled), whole shell, irregular or rounded disc shape
Species
Anomia simplex
Shell Type
Bivalve (two-shelled), whole shell, irregular or rounded disc shape
Family
Anomiidae (Jingle Shell family)
Size
Approximately 1 inch in diameter, which is typical for this species. Adults generally range from 0.75 to 2 inches.
Color & Pattern
Translucent, pearlescent off-white or light yellowish tone with a shiny, glass-like luster. The color is natural and reflects a subtle mother-of-pearl sheen, especially when wet or held to the light.
Rarity
Very Common. Easily found washed up on beaches throughout its range, particularly after storms.
Habitat
Shallow marine waters, typically found attached to hard substrates such as rocks, docks, pilings, or other shells in the intertidal to shallow subtidal zones down to about 30 feet.
Geographic Range
Western Atlantic from Nova Scotia, Canada, down to Argentina, including the Gulf of Mexico and the Caribbean Sea.
Description
A delicate, paper-thin bivalve shell with an irregular, rounded, or oval contour. The exterior features distinct, concentric growth rings and lines, giving it a somewhat scaly or layered appearance. The shell is remarkably translucent, often allowing light to pass directly through it, and exhibits a glassy, pearlescent interior.
Key Features
Translucent, thin, paper-like texture with a pearlescent sheen, concentric growth ridges, and an irregular rounded shape. Unlike typical clams, the lower valve usually has a deep notch or hole through which a calcified byssus protrudes to anchor the animal.
Collector Value
Low monetary value due to their abundance, but they remain popular among beginning beachcombers and crafters who use them for decorative art projects and homemade jewelry.
Condition Notes
Good condition. The shell appears intact with slight wear along the margins, common for beach-collected specimens. The pearlescent luster remains strong, placing it in the Good to Fine collectibility grade.
Interesting Facts
Jingle shells get their common name from the pleasant, tinkling sound they make when a collection of them is shaken together. Historically, strings of these shells have been used to make wind chimes, curtains, and various pieces of shell jewelry due to their metallic-like jingle and iridescent shine.
Ecological Role
Filter feeders that help clear particulate matter from the water column, improving water quality. They serve as a food source for various marine predators such as crabs, starfish, and carnivorous snails.
Similar Species
Pododesmus cepio (Pacific False Jingle) which is found on the West Coast and tends to be larger and more greenish, and Placuna placenta (Windowpane oyster) which is much larger and completely flat.
Beach Finding Tips
Look along the high tide drift line on sandy or shell-strewn beaches, particularly after rough weather or high surf. Sifting through shell piles in shallow water can also yield pristine, attached pairs.