Chaetognatha
arrow worms
i
2026-08-05: itis_id 158650 via WoRMS external link
The Chaetognatha or chaetognaths are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, they are mostly pelagic; however about 20% of the known species are benthic, and can attach to algae and rocks.W CalCOFI holds 6,934 observations of it in 2 datasets between 1951 and 2026.R
- 6,934
- observations
- 6,937
- records
- 1,818
- sampling events
- 1951–2026
- years
- 2
- datasets
Observed in 2 datasetsi
One row per dataset, and beside it 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.
i
One row per dataset, and beside it 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.
-
name used: Chaetognatha chaetognatha · code
3 -
name used: Chaetognatha CHAETOGNATHA · code
4
Ways inExplorerdb-queryERDDAPRPythonThis page as JSON
Code and endpoints ERDDAP · R · Python · JSON
library(calcofi4r) con <- cc_get_db() # the promoted release tbl(con, "obs_bio") |> filter(taxon_key == "worms:2081")
import calcofi4py as cc
con = cc.cc_get_db()
con.sql("SELECT * FROM obs_bio WHERE taxon_key = 'worms:2081'").df()Read from taxa.json of release v2026.10.19, written at release by calcofi4db::build_taxa_catalog(). The catalog's index is /species/.
How big is it not on record
Not on record: no authority the fetcher reads carries a length for this taxon (a genus page could show the range of its species).
Lineage 2 ranks · Biota to Animalia
Credits silhouette · photo · text
- Silhouette · Scott Hartman · CC0 1.0 · PhyloPic, drawn from Chaetognatha · source
- Photo · Георгий Виноградов (Georgy Vinogradov) · CC BY 4.0 · inat · source
- Text · Wikipedia, “Chaetognatha” · CC BY-SA 4.0 · revision 1370996159
Elsewhere Wikidata · iNaturalist · GBIF
The same organism on the services the faces were fetched from; the authorities' own pages are the ids in the head.
Cite the release, v2026.10.19
Cite the release, v2026.10.19; each dataset's own citation, licence and DOI are on its page. How to cite ↗