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

Balaenoptera musculus

Blue Whale

WoRMS 137090ITIS 180528key worms:137090
i

2026-08-05: itis_id 180528 via WoRMS external link

Silhouette · T. Michael Keesey · CC BY-SA 3.0 · PhyloPic, drawn from Balaenoptera musculus
Blue Whale33 m
R/V Reuben Lasker63.6 m

max · sealifebase

Photograph of Balaenoptera musculus
Photo · NOAA Photo Library, no known copyright restrictions (public domain) · Public domain · inat

The blue whale is a species of baleen whale and the largest marine mammal in the rorqual family Balaenopteridae. Reaching a maximum confirmed length of 29.9–30.5 m (98–100 ft) and weighing up to 190–200 t, it is the largest animal known to have ever existed.W CalCOFI holds 162 observations of it in 1 dataset between 1987 and 2019.R

162
observations
162
records
162
sampling events
1987–2019
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.

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:137090%22