Wrinkled Abalone, Black Abalone, or similar ear-shell
Phylum: Mollusca, Class: Gastropoda, Order: Vetigastropoda, Family: Haliotidae, Genus: Haliotis, Species: Haliotis cracherodii · Haliotidae (Abalone family, ear shells) · Gastropod (univalve), whole shell, flattened oval or ear-shaped with a lateral spire
Species
Haliotis cracherodii (Black Abalone) or Haliotis spp. with high confidence in the genus Haliotis
Shell Type
Gastropod (univalve), whole shell, flattened oval or ear-shaped with a lateral spire
Family
Haliotidae (Abalone family, ear shells)
Size
Approximately 2 to 3 inches in length, which is slightly smaller to average for adult abalone species which typically range from 2 to 8 inches depending on the specific species.
Color & Pattern
Dull brownish-grey to dark brown exterior with heavy weathering, encrustations, and textured cord-like ribs. The natural nacre (mother-of-pearl) interior is obscured in this view, showing only a rough, weathered exterior surface.
Rarity
Common to Uncommon depending on local conservation restrictions, though finding intact specimens washed up on beaches can be moderately challenging due to strict protections in many regions.
Habitat
Rocky intertidal and shallow subtidal zones, typically clinging firmly to rocks in wave-swept coastal environments using their powerful muscular foot.
Geographic Range
Eastern Pacific coastline, ranging from Oregon down to Baja California, Mexico.
Description
An ear-shaped marine snail shell featuring a low profile, a small prominent lateral spire, and a heavily textured, rough exterior surface characterized by strong spiral cords and growth lines. The shell is designed to withstand heavy wave action in intertidal habitats.
Key Features
Ear-shaped (auriform) morphology, flattened spiral positioned near the edge, rough corded exterior sculpture, and a series of respiratory pores (though mostly obscured or weathered in this specific view).
Collector Value
Low to Moderate as a beach-worn specimen. Pristine, highly polished, or gem-grade abalone shells with intact respiratory holes command much higher values, while weathered specimens are typically kept for educational or craft purposes.
Condition Notes
Fair to Good collector condition for a weathered beach find. The exterior shows significant natural wear, loss of primary coloration, and minor organic encrustations, typical of specimens subjected to wave action and exposure.
Interesting Facts
Abalones are famous for their interior iridescent nacre, commonly known as mother-of-pearl. Their muscular foot is also widely consumed as a delicacy, which has unfortunately led to overfishing and strict conservation regulations worldwide.
Ecological Role
Abalones are important herbivorous grazers in marine kelp forest ecosystems, feeding primarily on drift kelp and algae. They serve as prey for sea otters, large fish, and octopuses, and many species face conservation challenges due to overharvesting and disease.
Similar Species
Red Abalone (Haliotis rufescens) and Green Abalone (Haliotis fulgens), which can be distinguished by differences in coloration, size, the number of open respiratory holes, and exterior sculpture patterns.
Beach Finding Tips
Search rocky intertidal zones, tide pools, and pebble beaches during extreme low tides, especially after winter storms that dislodge shells from rocky reefs.