E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Hapalogaster grebnitzkii Schalfeew, 1892
Northern Hairy Crab
Family: Lithodidae

Species account author: Josephine Hart.
Extracted from Crabs and their relatives of British Columbia.
Photo of species

© Aaron Baldwin  Email the photographer   (Photo ID #96981)

E-Fauna BC Static Map
Distribution of Hapalogaster grebnitzkii in British Columbia
Details about map content are available here.

Species Information

Carapace relatively flat, covered with short, soft, capitate setae as well as tufts of longer, stiff, clavate setae. Rostrum broadly triangular with a sharp tip and longer than orbital and antero-lateral teeth which are subequal in length with tips curved toward each other. Margin of carapace behind cervical groove cut into stout teeth, which decrease in size posteriorly. Abdomen setose. Eyestalk short and stout. Antennal base spined. Inner margin of last 2 segments of third maxilliped not inflated. Right cheliped stout with dactyl slightly more than half length of palm. Palm with 3 longitudinal rows of spines, the stout upper row being separated from the other 2 by a flat smooth surface. Fingers stout, spoon-shaped, with finely toothed margins. Ventrally mostly naked with an elongated membranous area at base of fixed finger. Smaller left cheliped similar but without membranous area. Walking legs flattened; all dorsal margins (except those of dactyls) are serrate with stout teeth as are the ventral margins of the meri. Chelipeds and walking legs setose, like the carapace, but with the addition of many long, soft setae on the outer margins.


Carapace: male 23 x 24 mm.


Preserved specimen similar to H. mertensii. Colour of surface masked by light brown setae. Carapace red and orange; marginal spines with white tips. Branchial area pale blue-grey. Abdomen pale brown. Fingers of chelipeds red with yellow tips and white teeth. Walking legs with patches of red dorsally and orange ventrally, with dactyls red proximally and orange distally; claw dark brown. Antennal flagellum uniform brown. Sternum orange with some red spots.


Well adapted to secrete themselves between loose rocks and in rocky crevices.



North Pacific Ocean from Sea of Japan to Alaska and south to the southeast side of Winter Inlet, Pears Island, British Columbia (54°58.7’N,130°27.5’W); intertidal to 90 m. California records are not valid (Hart 1980).
Distribution In British Columbia

Known only from the above record.

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

Additional Photo Sources

General References

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2021. E-Fauna BC: Electronic Atlas of the Fauna of British Columbia [efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2023-10-01 7:57:01 AM]
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