Species · accepted · checked 2026-08-05

Trachurus symmetricus

Jack mackerel

WoRMS 273305ITIS 168586GBIF 5210487key worms:273305

2026-08-05: itis_id 168586 via WoRMS external link

Silhouette · kstierhoff · CC0 1.0 · PhyloPic, drawn from Trachurus symmetricus

Jack mackerel81 cm

bongo net ring71 cm

max · worms_attribute

Photograph of Trachurus symmetricus — Photo · T Miller · CC BY-NC 4.0 · inat NC

The Pacific jack mackerel, also known as the Californian jack mackerel or simply jack mackerel, is an abundant species of pelagic marine fish in the jack family, Carangidae.W CalCOFI holds 19,528 observations of it in 2 datasets between 1951 and 2023, as egg and larva.R

19,528
observations: 56,470
records: 55,366
sampling events: 1951–2023
years: 2
datasets: egg · larva
life stages

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.

CUFES Fish Eggs 45,838 obs · 45,838 events · 1997–2022 · egg
name used: Trachurus symmetricus · code trachurus_symmetricus
Ichthyoplankton 10,632 obs · 9,528 events · 1951–2023 · larva · egg
name used: Trachurus symmetricus Jack mackerel · code 514

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.

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/.

Explorer db-query

ERDDAPCalCOFI's own server, the CUFES Fish Eggs table constrained to this taxon

https://erddap.calcofi.io/erddap/tabledap/swfsc_cufes.html?&taxon_key=%22worms:273305%22

Trachurus symmetricus

How big is itiEvery 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.

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

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.

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/.