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Acoupa weakfish (Cynoscion acoupa) — Sciaenidae

Acoupa weakfish

Cynoscion acoupa
Family: Sciaenidae
VU · Vulnerable

The Acoupa weakfish (Cynoscion acoupa) is a fish that lives in both fresh and salt water of the family Sciaenidae that grows up to 110 cm.

Length
110 cm
Water
Euryhaline
Depth
1.0–20.0 m
Diet
Carnivore
Behaviour
Schooling
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Coastal waters and river mouths of eastern South America.
Edibility
Commonly eaten

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Description

The acoupa weakfish (Cynoscion acoupa) is a large drum of the family Sciaenidae from coastal waters of eastern South America. The species has a streamlined, silvery body and can reach about 1.1 metres. It forms schools over mud and sandy-mud bottoms near river mouths; juveniles are restricted to brackish and fresh water. The diet consists of shrimps and fishes. The species is a very important food fish and is fished commercially and recreationally; its swim bladder is also prized. Owing to heavy fishing it is considered Vulnerable (VU). Like other drums it can make drumming sounds.

Frequently asked questions

How do you recognise the Acoupa weakfish?

The Acoupa weakfish has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Important food fish with a sought-after swim bladder; makes drumming sounds (VU).

Where does the Acoupa weakfish live?

The Acoupa weakfish lives in both fresh and salt water and is mostly found around sand or mud bottom. Coastal waters and river mouths of eastern South America.

How big does the Acoupa weakfish get?

The Acoupa weakfish grows to a maximum of about 110 cm. On average the species is around 45 cm.

Is the Acoupa weakfish dangerous to humans?

No, the Acoupa weakfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

Is the Acoupa weakfish edible?

Yes, the Acoupa weakfish is commonly eaten.

More photos

Acoupa weakfish (Cynoscion acoupa) — Sciaenidae — 2
iNaturalist ((c) Diogo Luiz, some rights reserved (CC BY))
Acoupa weakfish (Cynoscion acoupa) — Sciaenidae — 3
Wikimedia Commons — Buffon, Georges Louis Leclerc; Cuvier, Georges; Valenciennes (Public domain)
Acoupa weakfish (Cynoscion acoupa) — Sciaenidae — 4
iNaturalist ((c) Julien Piolain, some rights reserved (CC BY-NC))
Acoupa weakfish (Cynoscion acoupa) — Sciaenidae — 5
iNaturalist ((c) Mark Henry Sabaj, some rights reserved (CC BY-NC))
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All data

Identification

English name
Acoupa weakfish verified
Scientific name
Cynoscion acoupa
Family
Sciaenidae
Other names
Acoupa weakfish; Blacktail basher; Grey silk; Grey snapper; Snapper bashaw; White bashaw verified

Appearance

Size class
Extra large verified
Max length (cm)
110.0 verified
Average length (cm)
45.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Plain inferred
Tail shape
Straight inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Euryhaline sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
1.0 verified
Max depth (m)
20.0 verified
Natural range
Coastal waters and river mouths of eastern South America. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Shrimps and fishes sourced
Social behaviour
Schooling 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
Important food fish with a sought-after swim bladder; makes drumming sounds (VU). sourced

For anglers

Edibility
Commonly eaten sourced
Fishing method
Fishing with natural bait (shrimp or small fish) or lures near river mouths and coastal channels; fish sparingly given its vulnerable status. sourced
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

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

Same genus Cynoscion

More from the family Sciaenidae

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