Gastropoda | Patellogastropoda
Environment / Climate / Range
Benthic; depth range 0 - 6 m (Ref. 865). Subtropical; 44°N - 28°N, 125°W - 113°W
Eastern Pacific: USA to Mexico. Historically occurred from Crescent City, California to southern Baja California, Mexico; however, current constricted range occurs from Point Arena, California to Bahia Tortugas, Mexico.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 5 - ? cm Max length : 29.0 cm SHW male/unsexed; (Ref. 312); max. reported age: 51 years (Ref. 8702)
Fisheries: the meat is eaten fresh or dried; the shell is used as ornament or served as spoons or bowls (Ref. 312). Found under large rocks and in deep crevices in the middle to low intertidal zones. Herbivorous; known to grab drifting blades of brown algae with their tentacles; they also scrape diatoms and other microscopic algae from rocks. Usually feeds on various species of brown algae, but the smaller individuals ingest diatoms and coralline algae. Preyed on by humans. Under crowded conditions, adult abalones may graze the growth of marine plants from other shells (Ref. 312). Broadcast spawners (Ref. 105180).
Broadcast spawners (Ref. 105180).
Gallivan, G. and J. Danforth. 1999. (Ref. 312)
Shell is dark blue-black and smooth. It is usually free from seaweed and other marine growth. The holes near the shell edge are used to carry of waste and release eggs and sperm (Ref. 312).
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
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Estimates of some properties based on models
): 12.2 - 18.6, mean 15.9 (based on 61 cells; Ref. 115970