Atlantic Deep-sea Scallop or Little Spectacle Scallop
Phylum Mollusca, Class Bivalvia, Order Pectinida, Family Pectinidae, Genus Caribachlamys, Species Caribachlamys pellucens · Pectinidae (Scallop family) · Bivalve, whole single valve, fan-shaped
Species
Caribachlamys pellucens
Shell Type
Bivalve, whole single valve, fan-shaped
Family
Pectinidae (Scallop family)
Size
Approximately 1.5 inches in height and width, which is average for this species. Adults typically range between 1 to 2 inches.
Color & Pattern
Stunning deep purplish-magenta and violet coloration radiating in bands along the prominent ribs, contrasting with lighter whitish or cream undertones near the umbo and valleys. The colors appear natural and vibrant, showing strong contrast without severe sun-bleaching.
Rarity
Uncommon, as vibrant color morphs require dedicated searching and are rarely found pristine on ordinary beaches.
Habitat
Found in marine environments, typically inhabiting shallow subtidal waters to moderate depths, attached by byssus threads to hard substrates like rocks, coral rubble, or reefs.
Geographic Range
Western Atlantic, Caribbean Sea, and the Gulf of Mexico.
Description
A charming and brightly colored bivalve featuring a classic fan shape with strongly raised, angular radial ribs. The exterior showcases an attractive interplay of deep purple and cream stripes running from the beak to the undulating margin. The auricles (ears) at the hinge are somewhat asymmetric, and the overall sculpture is crisp with fine concentric growth lines intersecting the main ribs.
Key Features
Distinctive fan-shaped symmetry, prominent and sharply defined radial ribs (usually numbering around 15 to 20), unequal auricles at the hinge typical of the Pectinidae family, and striking purple-and-white color banding.
Collector Value
Moderately collectible and desirable due to its eye-catching purple coloration and intact shape. While not extremely expensive, specimens with such vivid color are prized by casual and intermediate shell collectors, typically valued between $5 and $15.
Condition Notes
Good to Fine condition. The valve is intact with well-preserved coloration and minimal edge wear. The margins show minor natural irregularities, but the radial ribs and overall structural integrity are well-maintained.
Interesting Facts
Scallops are among the few bivalves that can actively swim. By rapidly clapping their valves together, they expel water to jet-propel themselves away from predators. They also possess dozens of tiny, bright blue eyes along the edge of their mantle that can detect light and shadow.
Ecological Role
Scallops serve as an important prey base for marine carnivores including sea stars, crabs, octopuses, and fish. As filter feeders, they help clarify coastal waters by consuming microscopic phytoplankton.
Similar Species
Other Caribbean scallops such as Caribachlamys sentis (the St. Thomas Scallop), which can be distinguished by finer ribbing and different color variations, as well as Argopecten gibbus (Atlantic Calico Scallop), which generally has more rounded ribs and a mottled pattern.
Beach Finding Tips
Look for these shells by beachcombing in the Caribbean or southern Florida after strong storms or heavy onshore winds, particularly around rocky areas, jetties, or shell piles deposited near coral reef tracts.