Atlantic deep-sea scallop
NameAtlantic deep-sea scallop
Scientific NamePlacopecten magellanicus
Common NameAtlantic deep-sea scallop
FamilyPectinidae
GenusPlacopecten
Speciesmagellanicus
Geographic DistributionWestern Atlantic Ocean, ranging from Newfoundland, Canada, south to Cape Hatteras, North Carolina, USA.
Average Size (mm)Can grow up to 200-250 mm (8-10 inches) in diameter, with an average commercial size often around 100-150 mm.
Identifying FeaturesLarge size, nearly circular shape, prominent and numerous radial ribs (typically 15-20), relatively small and unequal auricles, and a generally smooth interior. The upper valve is more convex than the lower. The coloration is often a distinguishing feature.
Dietfilter-feeder
Raritycommon
Author Citation(Gmelin, 1791)
Description
A large, robust bivalve shell, typically orbicular (roundish) in shape, with a convex upper valve and a flatter lower valve. The exterior is characterized by numerous, distinct radial ribs and concentric growth lines. The shell in the image displays a warm reddish-brown to orange-brown coloration, with a darker, purplish-brown umbo region. Small, irregular markings are visible on the surface, possibly indicating wear or minor epibiont attachment. The shell is held in a hand, suggesting a significant size.
