Common Atlantic Jingle Shell (also known as Jingle Shell, Mermaid's Toenail, or Silver Shell)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Anomiidae, Genus: Anomia, Species: Anomia simplex · Anomiidae (Jingle Shell family) · Bivalve (two-shelled mollusk), specifically a whole upper valve showing characteristic irregular shape and pearlescent luster
Species
Anomia simplex
Shell Type
Bivalve (two-shelled mollusk), specifically a whole upper valve showing characteristic irregular shape and pearlescent luster
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 across.
Color & Pattern
Translucent to opaque with a silvery, pearlescent sheen. Colors can range from pearly white, silver, and pale yellow to vibrant shades of orange, bright yellow, and deep salmon pink. The surface is glossy with concentric growth lines and lacks complex color patterns.
Rarity
Very Common
Habitat
Found attached to hard substrates, rocks, pilings, and other shells in shallow marine waters, intertidal zones, and bays, ranging from the low intertidal zone down to moderate depths of several fathoms.
Geographic Range
Western Atlantic from Nova Scotia, Canada, down the coast of the United States to Florida, the Gulf of Mexico, the Caribbean, and parts of South America.
Description
A delicate, paper-thin bivalve with a rounded to irregularly oval shape that conforms to the surface it attaches to. The outer surface exhibits fine concentric growth lines and a smooth, highly reflective, metallic or pearlescent luster that gives the shell its popular name due to the jingling sound they make when gathered together.
Key Features
Thin, translucent, asymmetrical valves with a distinct pearlescent sheen; the lower valve features a deep notch or foramen through which a muscular, calcified byssus protrudes to anchor the animal permanently to a substrate.
Collector Value
Low monetary value, but widely collected and prized by amateur beachcombers and crafters for making shell art, jewelry, and decorative wind chimes due to their bright metallic colors.
Condition Notes
Good condition whole upper valve. It is intact with a bright pearlescent surface, minimal edge wear, and no major cracks, representing a typical well-preserved beach find.
Interesting Facts
The common name 'Jingle Shell' comes from the pleasant, tinkling sound a collection of these shells makes when shaken together in a container. Historically, strings of these shells have been used to make decorative wind chimes, jewelry, and lampshades.
Ecological Role
Filters phytoplankton and organic particles from the water column, contributing to water clarity. They serve as a food source for various carnivorous gastropods, fish, and crabs.
Similar Species
Pododesmus cepio (Green False Jingle), which is typically larger, greener, and heavier, and found primarily on the Pacific coast.
Beach Finding Tips
Look along the high tide drift lines on sandy and shelly beaches, especially after storms or heavy wave action. They frequently wash ashore in great numbers along the Gulf Coast of Florida.
Notes
Tampa, Florida