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Dusky seargent (Abudefduf concolor) — Pomacentridae

Dusky seargent

Abudefduf concolor
Family: Pomacentridae
LC · Least Concern

The Dusky seargent (Abudefduf concolor) is a saltwater fish of the family Pomacentridae that grows up to 19 cm.

Length
19 cm
Water
Saltwater
Depth
0.0–12.0 m
Diet
Omnivore
Behaviour
Small groups
Activity
Diurnal
Body shape
Flat / disc-shaped
Substrate
Stone or rock
Danger
Harmless
Range
Eastern Pacific; rocky coastal reefs with wave action.
Edibility
Rarely eaten

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Description

The dusky sergeant is a damselfish (Pomacentridae) from the eastern Pacific. Unlike many sergeants this species lacks the conspicuous crossbars and is largely uniform grey-brown. Adults inhabit rocky coastal reefs exposed to wave action. As an omnivore it grazes algae and takes small zooplankton and small invertebrates. It is territorial in the spawning season, when the male guards the eggs laid on the rock. The species is harmless to humans.

Frequently asked questions

How do you recognise the Dusky seargent?

The Dusky seargent has a flattened, disc-shaped body, is mainly brown and shows a plain pattern. Uniformly greyish brown without the vertical bars of other sergeant majors; territorial egg guarder.

Where does the Dusky seargent live?

The Dusky seargent lives in the sea (marine waters) and is mostly found around stony or rocky ground. Eastern Pacific; rocky coastal reefs with wave action.

How big does the Dusky seargent get?

The Dusky seargent grows to a maximum of about 19 cm. On average the species is around 10 cm.

Is the Dusky seargent dangerous to humans?

No, the Dusky seargent is harmless to humans. None required: this species is harmless to humans.

Is the Dusky seargent edible?

The Dusky seargent is rarely eaten.

More photos

Dusky seargent (Abudefduf concolor) — Pomacentridae — 2
iNaturalist ((c) Ben Cantrell, some rights reserved (CC BY-NC))
Dusky seargent (Abudefduf concolor) — Pomacentridae — 3
iNaturalist ((c) Ben Cantrell, some rights reserved (CC BY-NC))
Dusky seargent (Abudefduf concolor) — Pomacentridae — 4
Wikimedia Commons — Sylvain Eichhorn (CC BY 4.0)
Dusky seargent (Abudefduf concolor) — Pomacentridae — 5
iNaturalist ((c) Ken-ichi Ueda, some rights reserved (CC BY))
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All data

Identification

English name
Dusky seargent verified
Scientific name
Abudefduf concolor
Family
Pomacentridae
Other names
Night sergeant verified

Appearance

Size class
Medium verified
Max length (cm)
19.0 verified
Average length (cm)
10.0 verified
Body shape
Flat / disc-shaped sourced
Dominant colour
Brown inferred
Pattern
Plain inferred
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
0.0 verified
Max depth (m)
12.0 verified
Natural range
Eastern Pacific; rocky coastal reefs with wave action. inferred
Origin
Native sourced

Behaviour & biology

Diet
Omnivore sourced
Diet (detail)
Algae, small zooplankton and small invertebrates sourced
Social behaviour
Small groups inferred
Territorial
Yes inferred
Activity
Diurnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Uniformly greyish brown without the vertical bars of other sergeant majors; territorial egg guarder. sourced

For anglers

Edibility
Rarely eaten sourced
Fishing method
Fishing with natural bait (fish, shrimp, worm) or lures close to reef and rock structures. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced
First aid
None required: this species is harmless to humans. sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Abudefduf

More from the family Pomacentridae

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