Little Coffee Bean, Atlantic Coffee Bean (Triviaeductus suffusus or similar)
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Triviidae, Genus: Trivia, Species: Trivia pediculus · Triviidae (Coffee Bean or Trivia family) · Gastropod (snail/univalve), whole shell, ovate or bean-shaped
Species
Trivia pediculus
Shell Type
Gastropod (snail/univalve), whole shell, ovate or bean-shaped
Family
Triviidae (Coffee Bean or Trivia family)
Size
Approximately 1/2 inch (10-15 mm), which is typical for adult coffee bean shells of this species range.
Color & Pattern
Pale cream to light pinkish-beige base color, featuring faint brownish spots along the dorsum with distinct, continuous transverse ribs running across the back to the inner margin. The coloring is natural and slightly glossy.
Rarity
Common, frequently found by dedicated beachcombers and shell collectors in appropriate regions.
Habitat
Found in shallow subtidal waters down to moderate depths, typically living under rocks, coral rubble, or among seaweed in tropical to subtropical marine environments.
Geographic Range
Widespread throughout the tropical Western Atlantic, including the Caribbean Sea, the Florida Keys, the Gulf of Mexico, and down to Brazil.
Description
This charming small gastropod is shaped remarkably like a coffee bean. The dorsal surface features prominent, evenly spaced transverse ribs that span entirely across from one lip to the other, intersected by a distinct longitudinal furrow. The aperture is narrow and hidden underneath, lined with fine teeth on both sides.
Key Features
Ovate bean-like shape, prominent transverse ribs crossing the entire dorsal surface, a central longitudinal groove (sulcus) running down the back, and a narrow denticulated aperture.
Collector Value
Low to moderate commercial value, but highly popular among micro-shell enthusiasts and beachcombers building comprehensive regional collections. Typically valued at a few dollars per specimen.
Condition Notes
The shell appears to be in Good to Fine condition with natural luster, intact ribs, and no major structural fractures or boring marks visible.
Interesting Facts
Despite their common name and superficial resemblance to cowries (Cypraeidae), trivias are actually more closely related to false limpets and wentletraps. They feed primarily on tunicates (sea squirts).
Ecological Role
As specialized predators of tunicates, Triviidae play a regulatory role in benthic invertebrate communities. They serve as prey for various reef fish and carnivorous marine snails.
Similar Species
Atlantic Little Bean (Trivia candidula) and other Trivia species, which can be distinguished by differences in the spacing of the ribs, the depth of the dorsal sulcus, and spot patterns.
Beach Finding Tips
Look for these small shells by sifting through shell drift lines on Caribbean or southern Florida beaches, or by checking under loose coral rocks during extreme low tides.