Species · accepted · checked 2026-08-05

Sternoptyx diaphana

Longspine hatchetfish

WoRMS 127314ITIS 162227GBIF 2347557key worms:127314

2026-08-05: itis_id 162227 via WoRMS external link

Silhouette · Christopher Kenaley · CC0 1.0 · PhyloPic, drawn from Sternoptyx pseudobscura

Longspine hatchetfish5.5 cm

US quarter2.4 cm

max · worms_attribute

Photograph of Sternoptyx diaphana — Photo · Ken Graham · CC BY-NC 4.0 · inat NC

Sternoptyx diaphana, the diaphanous hatchetfish, is a species of deep sea ray-finned fish in the family Sternoptychidae. It is the type species of the genus Sternoptyx, and was first described by the French naturalist Johann Hermann in Der Naturforscher 1781.W CalCOFI holds 2 observations of it in 2 datasets between 1991 and 2011, as larva.R

2
observations: 2
records: 2
sampling events: 1991–2011
years: 2
datasets: 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.

Mesopelagic Fish 1 obs · 1 events · 2011
name used: Sternoptyx diaphana · code Sternoptyx diaphana
Ichthyoplankton 1 obs · 1 events · 1991 · larva
name used: Sternoptyx diaphana Longspine hatchetfish · code 106

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 Mesopelagic Fish table constrained to this taxon

https://erddap.calcofi.io/erddap/tabledap/sio_mesopelagic-fish.html?&taxon_key=%22worms:127314%22

Sternoptyx diaphana

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/.