Lion's Paw Scallop (also known as Nodipecten nodosus)
Phylum: Mollusca, Class: Bivalvia, Order: Pectinida, Family: Pectinidae, Genus: Nodipecten, Species: N. nodosus · Pectinidae (Scallop family) · Bivalve (two-shelled), whole valve, fan-shaped disc
Species
Nodipecten nodosus
Shell Type
Bivalve (two-shelled), whole valve, fan-shaped disc
Family
Pectinidae (Scallop family)
Size
Approximately 3 to 4 inches in width, which is a moderate to large size for this species. Adults typically range from 3 to 6 inches.
Color & Pattern
Vibrant orange and pinkish-red coloration with alternating pale cream or white bands and concentric growth marks. The interior shows bright orange hues matching the exterior pigmentation. Colors appear completely natural and well-preserved with high gloss.
Rarity
Common in specialized dive shops and among collectors, but uncommon to find in pristine condition while beachcombing due to its subtidal habitat.
Habitat
Shallow subtidal waters, often found on sandy or gravelly bottoms attached by byssus threads when young, becoming free-living as adults. Typically found at depths ranging from 5 to 45 meters.
Geographic Range
Western Atlantic Ocean, from North Carolina through the Gulf of Mexico, Caribbean Sea, and down to Brazil.
Description
A magnificent fan-shaped bivalve with prominent radial ribs and characteristic rounded nodes or tubercles lining the main ribs. The hinge features distinct unequal auricles (ears), typical of scallops, and the margins are scalloped to form a tight, interlocking seal when closed.
Key Features
Prominent, heavy rounded nodes (tubercles) on the raised radial ribs, asymmetrical auricles at the hinge, and a robust, thick-shelled fan shape that distinguishes it from other scallops.
Collector Value
Highly desirable due to its striking coloration and tactile knobby texture. Specimens in gem condition with deep orange or purple hues are prized by collectors and often command moderate prices in shell shops.
Condition Notes
Gem to Fine grade condition. The shell is intact with rich, vibrant color, unbroken margins, sharp sculptural ribs, and no major signs of boring or heavy erosion.
Interesting Facts
Unlike many bivalves, Lion's Paw scallops are capable of swimming short distances by rapidly clapping their valves together to expel water, helping them escape predators like sea stars.
Ecological Role
Acts as an active suspension feeder filtering phytoplankton from the water column, serving as an important prey item for large marine predators like octopuses, sea stars, and carnivorous gastropods.
Similar Species
Pacific Lion's Paw (Nodipecten subnodosus), found on the Pacific coast of the Americas, which tends to be larger and heavier with slightly different node configurations.
Beach Finding Tips
Rarely found intact on open beaches due to living in deeper subtidal waters; best acquired from divers, local fish markets, or specialized shell dealers, though single valves occasionally wash ashore after severe storms.