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Bacu pedra (Hassar orestis) — Doradidae

Bacu pedra

Hassar orestis
Family: Doradidae

The Bacu pedra (Hassar orestis) is a freshwater fish of the family Doradidae that grows up to 30 cm.

Length
29.8 cm
Water
Freshwater
Behaviour
Schooling
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Can cause injury
Range
South America: Brazil, Colombia, Ecuador, Guyana, Peru, Venezuela

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Description

Orestes' thorny catfish is a thorny catfish (Doradidae) from large rivers of the Amazon basin and the Guianas in South America. The species grows to about 20 cm and has a sturdy, silver-grey body with a pointed snout, long barbels and a row of bony, thorned plates along the flank. As a nocturnal bottom-dweller it moves in schools over sand and mud and searches for insect larvae, snails and detritus. The stout, serrated pectoral and dorsal spines can give a painful puncture wound when handled.

Frequently asked questions

How do you recognise the Bacu pedra?

The Bacu pedra has an elongate, eel-like body and is mainly silver-grey. Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care.

Where does the Bacu pedra live?

The Bacu pedra lives in fresh water and is mostly found around sand or mud bottom. South America: Brazil, Colombia, Ecuador, Guyana, Peru, Venezuela

How big does the Bacu pedra get?

The Bacu pedra grows to a maximum of about 30 cm.

Is the Bacu pedra dangerous to humans?

The Bacu pedra can cause injury; handle it with care. For a cut or puncture from a sharp fin spine: rinse the wound with clean water, apply pressure to stop bleeding and cover with a sterile dressing. Check that no spine fragment remains and watch for signs of infection; for a deep wound update tetanus protection.

More photos

Bacu pedra (Hassar orestis) — Doradidae — 2
iNaturalist ((c) IPBio - Reserva Jutuarana, some rights reserved (CC BY-NC))
Bacu pedra (Hassar orestis) — Doradidae — 3
iNaturalist ((c) H L Ooi, some rights reserved (CC BY-NC))
Bacu pedra (Hassar orestis) — Doradidae — 4
IPBio - Reserva Jutuarana (CC BY-NC 4.0) via GBIF — iNaturalist
Bacu pedra (Hassar orestis) — Doradidae — 5
iNaturalist ((c) IPBio - Reserva Jutuarana, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Bacu pedra sourced
Scientific name
Hassar orestis
Family
Doradidae

Appearance

Size class
Medium verified
Max length (cm)
29.8 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Silver / grey sourced
Tail shape
Forked inferred
Barbels
Yes sourced
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
South America: Brazil, Colombia, Ecuador, Guyana, Peru, Venezuela sourced
Origin
Native inferred

Behaviour & biology

Social behaviour
Schooling sourced
Territorial
No inferred
Activity
Nocturnal sourced
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care. inferred

For anglers

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
Can cause injury verified
First aid
For a cut or puncture from a sharp fin spine: rinse the wound with clean water, apply pressure to stop bleeding and cover with a sterile dressing. Check that no spine fragment remains and watch for signs of infection; for a deep wound update tetanus protection. sourced

Status & sources

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

More from the family Doradidae

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