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Barbu (Polydactylus virginicus) — Polynemidae

Barbu

Polydactylus virginicus
Family: Polynemidae
LC · Least Concern

The Barbu (Polydactylus virginicus) is a brackish-water fish of the family Polynemidae that grows up to 33 cm.

Length
33 cm
Water
Brackish
Depth
0.0–55.0 m
Diet
Carnivore
Behaviour
Small groups
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Western Atlantic; coastal waters, estuaries and mangroves.
Edibility
Commonly eaten

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Description

The barbu threadfin is a fish of the threadfin family (Polynemidae) from the western Atlantic. The species grows to about 33 cm and has a streamlined, silvery body and, characteristic of the family, several free, thread-like lower pectoral-fin rays that hang down separately from the fin. With these sensitive threads it probes the sand and mud bottom for prey in turbid water. It inhabits coastal waters, estuaries and mangroves and sometimes enters fresh water. As a bottom searcher it feeds on small crustaceans, worms and small fishes. The species is a local food fish and is harmless to humans.

Frequently asked questions

How do you recognise the Barbu?

The Barbu has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Free, thread-like lower pectoral fin rays for probing the bottom for prey in turbid water.

Where does the Barbu live?

The Barbu lives in brackish water and is mostly found around sand or mud bottom. Western Atlantic; coastal waters, estuaries and mangroves.

How big does the Barbu get?

The Barbu grows to a maximum of about 33 cm. On average the species is around 20 cm.

Is the Barbu dangerous to humans?

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

Is the Barbu edible?

Yes, the Barbu is commonly eaten.

More photos

Barbu (Polydactylus virginicus) — Polynemidae — 2
iNaturalist ((c) IHUNTA, some rights reserved (CC BY-NC))
Barbu (Polydactylus virginicus) — Polynemidae — 3
Wikimedia Commons — Unknown authorUnknown author (Public domain)
Barbu (Polydactylus virginicus) — Polynemidae — 4
Florida Museum of Natural History Ichthyology (CC BY-NC 4.0) via GBIF — UF
Barbu (Polydactylus virginicus) — Polynemidae — 5
iNaturalist ((c) Eric van den Berghe, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Barbu verified
Scientific name
Polydactylus virginicus
Family
Polynemidae
Other names
Barbu; Barbú; Threadfin; Barbu threadfin; Beard fish; Catfish; Chinese nose; Sevenfingered threadfin; Threadfish verified

Appearance

Size class
Medium verified
Max length (cm)
33.0 verified
Average length (cm)
20.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Plain inferred
Tail shape
Forked inferred
Mouth position
Inferior (downward) inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
Two separate inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Brackish sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
0.0 verified
Max depth (m)
55.0 verified
Natural range
Western Atlantic; coastal waters, estuaries and mangroves. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Small crustaceans, worms and small fishes sourced
Social behaviour
Small groups inferred
Territorial
No inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Free, thread-like lower pectoral fin rays for probing the bottom for prey in turbid water. sourced

For anglers

Edibility
Commonly eaten sourced
Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. 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 Polydactylus

More from the family Polynemidae

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