CalCOFI.io CalCOFI.io open data ecosystem

Callorhinus ursinus

Northern Fur Seal

Speciesaccepted · checked 2026-08-05WoRMS 254997ITIS 180627key worms:254997
i

2026-08-05: itis_id 180627 via WoRMS external link

calcofi:marine_mammals

The northern fur seal is an eared seal found along the north Pacific Ocean, the Bering Sea, and the Sea of Okhotsk. It is the largest member of the fur seal subfamily (Arctocephalinae) and the only living species in the genus Callorhinus.W CalCOFI holds 167 observations of it in 1 dataset between 1989 and 2020.R

167
observations
167
records
167
sampling events
1989–2020
years
1
datasets
2.1 m
max length
Northern fur seal breeding colony. Male and harem. Male northern fur seal (foreground) and harem.
Photo · M. Boylan · Public domain · commons

Observed in 1 dataset
i

One row per dataset, and beside it one cell per year, darker with more observations — the same strip the front door draws per dataset. Each row ends with the name that dataset uses (dataset_taxon); the accepted name is written once, in the title above. A quiet pill marks a name the authority does not accept.

Ways inExplorerdb-queryERDDAPRPythonThis page as JSON

Code and endpoints ERDDAP · R · Python · JSON
ERDDAPCalCOFI's own server, the Seabirds & Marine Mammals table constrained to this taxon
https://erddap.calcofi.io/erddap/tabledap/farallon_bird-mammal.html?&taxon_key=%22worms:254997%22

Read from taxa.json of release v2026.10.20, written at release by calcofi4db::build_taxa_catalog(). The catalog's index is /species/.

How big is it 2.1 m max
Northern Fur Seal2.1 m
a person1.7 m

max · sealifebase

Every mark is a measured length with its own source — hover one to read it. The reference objects are _data/size_reference.csv: two of them, the 505 µm bongo mesh and the net's ring, are CalCOFI's own sampling gear.

Lineage 13 ranks · Biota to Callorhinus
Credits silhouette · photo · text · length
Elsewhere Wikidata · iNaturalist · GBIF

WikidataiNaturalistGBIF

The same organism on the services the faces were fetched from; the authorities' own pages are the ids in the head.

Cite the release, v2026.10.20

Cite the release, v2026.10.20; each dataset's own citation, licence and DOI are on its page. How to cite ↗