Iridescent Scallop
NameIridescent Scallop
Scientific NamePedum spondyloideum
Common NameIridescent Scallop
FamilyPectinidae
GenusPedum
Speciesspondyloideum
Geographic DistributionIndo-Pacific region, including the Red Sea, East Africa, and across to the Western Pacific.
Average Size (mm)70
Identifying FeaturesIts most distinctive features are the brilliant iridescent blue patterns on its mantle, the numerous small blue ocelli (eyes) lining the mantle edge, and its unique habit of living embedded within massive corals. The shell itself is often hidden by the coral.
Dietfilter-feeder
Raritycommon
Author Citation(Gmelin, 1791)
Description
The Iridescent Scallop, *Pedum spondyloideum*, is a fascinating bivalve mollusc known for its vibrant, iridescent blue mantle, which is prominently displayed in the image. Unlike many free-living scallops, this species lives commensally embedded within the living tissue of massive corals. Its shell is typically irregular and distorted, adapting to the shape of the cavity it creates within its coral host. The mantle is dark brown to purplish-brown, adorned with striking iridescent blue spots, lines, and patterns, and features numerous small, bright blue ocelli (eyes) along its edge, often with reddish-orange accents.
