Species · accepted · checked 2026-08-05

Icosteus aenigmaticus

Ragfish

WoRMS 281153ITIS 171663GBIF 2394445key worms:281153

2026-08-05: itis_id 171663 via WoRMS external link

Silhouette · Nathan Hermann · CC0 1.0 · PhyloPic, drawn from Pomatomus saltatrix

Ragfish2.1 m

a person1.7 m

max · worms_attribute

Photograph of Icosteus aenigmaticus — Photo · R. Mintern, no known copyright restrictions (public domain) · Public domain · inat

The ragfish is a ray-finned fish of the northern Pacific Ocean; although classified as a bony fish, its skeleton is mostly cartilage, and the larvae have pelvic fins that disappear as they mature. It is the sole member of the family Icosteidae within the order Scombriformes.W CalCOFI holds 87 observations of it in 1 dataset between 1951 and 2023, as larva and egg.R

87
observations: 87
records: 87
sampling events: 1951–2023
years: 1
datasets: larva · egg
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.

Ichthyoplankton 87 obs · 87 events · 1951–2023 · larva · egg
name used: Icosteus aenigmaticus Ragfish · code 541

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 Ichthyoplankton table constrained to this taxon

https://erddap.calcofi.io/erddap/tabledap/swfsc_ichthyo.html?&taxon_key=%22worms:281153%22

Icosteus aenigmaticus

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/.