CalCOFI.io CalCOFI.io open data ecosystem
Species · accepted · checked 2026-08-05

Callorhinus ursinus

Northern Fur Seal

WoRMS 254997ITIS 180627key worms:254997
i

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

Silhouette · Steven Traver · CC0 1.0 · PhyloPic, drawn from Callorhinus ursinus
Northern Fur Seal2.1 m
a person1.7 m

max · sealifebase

Northern fur seal breeding colony. Male and harem. Male northern fur seal (foreground) and harem.
Photo · M. Boylan · Public domain · commons

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

Observed in
i

One row per dataset, 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.

  • Seabirds & Marine Mammals 167 obs · 167 events · 1989–2020
    name used: Callorhinus ursinus Northern Fur Seal · code NFSE

How big is it
i

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.

Groups

calcofi:marine_mammals

Ways in
i

Read from taxa.json of release v2026.09.11, written at release by calcofi4db::build_taxa_catalog(). The catalog's index is /species/.

Explorerdb-query
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