Lion's Paw Scallop (also known as Nodipecten)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Pectinidae, Genus: Nodipecten, Species: Nodipecten nodosus · Pectinidae (Scallop family) · Bivalve (two-shelled clam), whole shell valves, fan shape
Species
Nodipecten nodosus
Shell Type
Bivalve (two-shelled clam), whole shell valves, fan shape
Family
Pectinidae (Scallop family)
Size
Approximately 5 to 6 inches across, which is large and typical for a mature adult of this species. Adults generally range from 4 to 8 inches.
Color & Pattern
The exterior features a creamy white to pale yellowish-tan base color with patches of orange-brown, showing signs of sun-bleaching and minor organic staining. The interior is smooth, pearly white with a hint of pink or orange near the hinge area. The colors appear natural but slightly weathered from exposure.
Rarity
Uncommon as a whole, high-quality beach find, though frequently traded among collectors.
Habitat
Inhabits shallow subtidal marine waters, typically attached by strong byssus threads or resting unattached on sandy, shell-gravel, or rocky bottoms and coral rubble. Found at depths ranging from 5 to 50 meters.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina and the Gulf of Mexico down through the Caribbean Sea to Brazil.
Description
A magnificent and heavy-duty bivalve featuring strong, prominent radial ribs adorned with characteristic large, hollow knobs or nodes along the ribs. The shell has an asymmetrical fan shape with unequal auricles (ears) at the hinge. The margins are deeply scalloped and interlock tightly, giving it a rugged, sculptural texture.
Key Features
Distinguished by the prominent, blunt knobs (nodes) along the radial ribs, the heavy and robust shell structure, and unequal ear projections at the hinge line.
Collector Value
Highly sought after by shell collectors for their impressive size, heavy texture, and striking form. Specimens with deep natural red, orange, or purple colors command higher prices, typically ranging from $15 to $50 depending on color vibrancy and condition.
Condition Notes
Good condition overall. The valves are intact with minor edge wear and surface weathering, fading some of the original vibrant red or purple coloration to a bleached white and tan. Rated as a Fine collector grade specimen.
Interesting Facts
Lion's paws can swim short distances by rapidly clapping their valves together to expel water, helping them escape predators like sea stars. They possess dozens of simple blue eyes along the mantle edge that can detect light and shadow.
Ecological Role
Acts as an important filter feeder, removing suspended particulate matter and phytoplankton from the water column. Serves as prey for various marine carnivores including octopuses, crabs, and sea stars.
Similar Species
Pacific Lion's Paw (Nodipecten subnodosus), which is found in the Eastern Pacific and generally grows larger with more numerous nodes.
Beach Finding Tips
Rarely found intact on standard public beaches due to their deep-water habitat; most beach specimens are fragments. Whole shells are typically acquired through scuba diving, local fishermen, or specialized shell dealers.