Lion's Paw Scallop (also known as Nodipecten Scallop)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Pectinidae, Genus: Nodipecten, Species: N. nodosus · Pectinidae (Scallop family) · Bivalve (two-shelled), whole shell valves, fan shape
Species
Nodipecten nodosus
Shell Type
Bivalve (two-shelled), whole shell valves, fan shape
Family
Pectinidae (Scallop family)
Size
Approximately 2 to 3 inches in length and width, which is on the smaller side for this species. Adult Nodipecten nodosus typically range from 3 to 6 inches.
Color & Pattern
Rich burgundy, deep red, and maroon base colors with contrasting white and cream mottled patches, particularly along the prominent ribs. The interior features a glossy porcelain-white finish with deep purple-red margins matching the exterior coloration. Colors are entirely natural and vibrant.
Rarity
Uncommon to Rare as a complete, high-quality beach find, though frequently available from specialty dealers and shell shops.
Habitat
Found in shallow subtidal waters down to moderate depths, typically inhabiting coral reefs, rocky areas, and coarse sandy substrates attached by byssus threads when young or unattached as adults.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina down through the Caribbean, Gulf of Mexico, and south to Brazil.
Description
A magnificent and heavy bivalve featuring strong, rounded radial ribs adorned with distinctive, knobby nodes that give the shell its iconic lion's paw appearance. The wings (auricles) at the hinge are somewhat asymmetrical, and the margins interlock with a strong, crenulated edge.
Key Features
Prominent, knobby nodes on the radial ribs, a thick and heavy shell structure compared to other scallops, and asymmetrical auricles at the straight hinge line.
Collector Value
Highly desirable for shell collectors due to its striking coloration and tactile knobby texture. Prices generally range from $10 to $50 depending on exact size, color saturation, and pristine condition.
Condition Notes
Very good to fine collectibility grade. The valves show strong natural coloration with minimal wear, intact margins, and a well-preserved hinge area.
Interesting Facts
Unlike many bivalves that remain buried in the sediment, Lion's Paws can swim short distances by rapidly clapping their valves together to expel water, helping them escape predators like sea stars.
Ecological Role
As suspension feeders, they filter phytoplankton from the water column, helping to maintain water clarity. They serve as an important food source for marine predators such as octopuses, sea stars, and large fish.
Similar Species
Pacific Lion's Paw (Nodipecten subnodosus), found on the Pacific coast of the Americas, which tends to grow larger and has slightly different rib node formations.
Beach Finding Tips
Finding a whole Lion's Paw while beachcombing is quite rare because they live offshore in deeper reef environments. They are most commonly acquired through scuba divers or specialized shell dealers rather than casual beach walking.