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

Tactostoma macropus

Longfin dragonfish

WoRMS 282922ITIS 162247GBIF 2347371key worms:282922
i

2026-08-05: itis_id 162247 via WoRMS external link

Silhouette · Yan Wong · CC0 1.0 · PhyloPic, drawn from Malacosteus niger
Longfin dragonfish34.3 cm
bongo net ring71 cm

max · worms_attribute

Photograph of Tactostoma macropus
Photo · Merlin Best · CC BY-NC 4.0 · inat NC

Tactostoma macropus, the longfin dragonfish, is a species of barbeled dragonfish found in the Pacific Ocean down to depths of 2,000 metres (6,600 ft). This species grows to a length of 34.3 centimetres (13.5 in) TL.W CalCOFI holds 330 observations of it in 2 datasets between 1951 and 2023, as larva.R

330
observations
330
records
330
sampling events
1951–2023
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.

  • Ichthyoplankton 309 obs · 309 events · 1951–2023 · larva
    name used: Tactostoma macropus Longfin dragonfish · code 142
  • Mesopelagic Fish 21 obs · 21 events · 2010–2012
    name used: Tactostoma macropus · code Tactostoma macropus

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/.

Explorerdb-query
ERDDAPCalCOFI's own server, the Ichthyoplankton table constrained to this taxon
https://erddap.calcofi.io/erddap/tabledap/swfsc_ichthyo.html?&taxon_key=%22worms:282922%22