Species · accepted · checked 2026-08-05

Abudefduf declivifrons

Mexican nightsergeant

WoRMS 273698ITIS 615041GBIF 2398662key worms:273698

2026-08-05: itis_id 615041 via WoRMS external link

Silhouette · Nicolas Mouquet · CC0 1.0 · PhyloPic, drawn from Abudefduf abdominalis

Mexican nightsergeant18 cm

bongo net ring71 cm

max · worms_attribute

Photograph of Abudefduf declivifrons — Photo · Alberto Alcalá · CC BY 4.0 · inat

Abudefduf declivifrons, commonly known as the Mexican nightsergeant, is a species of damselfish in the family Pomacentridae native to the eastern Pacific Ocean. It is known only from Mexico, where it ranges from the Gulf of California to Acapulco.W CalCOFI holds 1 observations of it in 1 dataset between 2000 and 2000, as larva.R

1
observations: 1
records: 1
sampling events: 2000
years: 1
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 1 obs · 1 events · 2000 · larva
name used: Abudefduf declivifrons Mexican nightsergeant · code 621

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:273698%22

Abudefduf declivifrons

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/.