Flat Abalone
NameFlat Abalone
Scientific NameHaliotis walallensis
Common NameFlat Abalone
FamilyHaliotidae
GenusHaliotis
Specieswalallensis
Geographic DistributionEastern Pacific Ocean, ranging from British Columbia, Canada, south to Baja California, Mexico, with a significant presence along the coast of California.
Habitatsubtidal
Average Size (mm)Up to 150 mm (6 inches) in length, but commonly found between 100-120 mm.
Identifying FeaturesKey identifying features include its flattened, oval shape, the presence of typically 4 to 6 open respiratory pores along the left margin (the image shows 5 clearly open pores), and a finely sculptured exterior with both concentric growth lines and faint radial ribs. The overall reddish-brown coloration with iridescent highlights is also characteristic.
Rarityrare
Author CitationStearns, 1899
Description
The Flat Abalone is a species of marine gastropod mollusk known for its relatively flattened, oval shell. The exterior is typically reddish-brown to orange-brown, often with iridescent green or blue patches, and features distinct concentric growth lines and less prominent radial ribbing. A row of open respiratory pores is characteristic along the left margin of the shell. The interior is highly iridescent, displaying a pearly nacre.
