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Redfin trahira (Erythrinus erythrinus) — Erythrinidae

Redfin trahira

Erythrinus erythrinus
Family: Erythrinidae
LC · Least Concern

The Redfin trahira (Erythrinus erythrinus) is a freshwater fish of the family Erythrinidae that grows up to 20 cm.

Length
20 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Range
Widespread in freshwater of tropical South America, mainly in the Amazon and Orinoco basins and coastal rivers of the Guianas.
Edibility
Rarely eaten

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Description

Erythrinus erythrinus is an elongate freshwater predator of the family Erythrinidae, widespread in tropical South America, especially the Amazon and Orinoco basins. It grows to about 20 cm and has a cylindrical, brownish-red body with a large, small-toothed mouth. Living in slow-moving and still waters, it can gulp air with its swim bladder, allowing it to survive oxygen-poor water and even short journeys over land between pools. A nocturnal predator, it hunts small fishes, insects and crustaceans. The species is only rarely eaten.

Frequently asked questions

How do you recognise the Redfin trahira?

The Redfin trahira has an elongate, eel-like body, is mainly brown and shows a plain pattern. Elongate predator that can gulp air with its swim bladder and so tolerates oxygen-poor water; can cover short distances over land between pools.

Where does the Redfin trahira live?

The Redfin trahira lives in fresh water and is mostly found around sand or mud bottom. Widespread in freshwater of tropical South America, mainly in the Amazon and Orinoco basins and coastal rivers of the Guianas.

How big does the Redfin trahira get?

The Redfin trahira grows to a maximum of about 20 cm.

Is the Redfin trahira dangerous to humans?

No, the Redfin trahira 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 Redfin trahira edible?

The Redfin trahira is rarely eaten.

More photos

Redfin trahira (Erythrinus erythrinus) — Erythrinidae — 2
iNaturalist ((c) Bradley Rasmussen, some rights reserved (CC BY-NC))
Redfin trahira (Erythrinus erythrinus) — Erythrinidae — 3
iNaturalist ((c) arthurlk11, some rights reserved (CC BY-NC))
Redfin trahira (Erythrinus erythrinus) — Erythrinidae — 4
Wikimedia Commons — Clinton & Charles Robertson (CC BY 2.0)
Redfin trahira (Erythrinus erythrinus) — Erythrinidae — 5
iNaturalist ((c) Tom Smith, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Redfin trahira inferred
Scientific name
Erythrinus erythrinus
Family
Erythrinidae

Appearance

Size class
Medium verified
Max length (cm)
20.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Plain inferred
Tail shape
Rounded sourced
Mouth position
Terminal sourced
Lips
Thin inferred
Barbels
No verified
Dorsal fins
One continuous verified
Dorsal spines
No sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
Widespread in freshwater of tropical South America, mainly in the Amazon and Orinoco basins and coastal rivers of the Guianas. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Small fishes, insects and crustaceans sourced
Social behaviour
Solitary sourced
Territorial
No inferred
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No inferred
Seasonality
Spawns in the rainy season when water levels rise. inferred
Special features
Elongate predator that can gulp air with its swim bladder and so tolerates oxygen-poor water; can cover short distances over land between pools. sourced

For anglers

Edibility
Rarely eaten inferred
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
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

More from the family Erythrinidae

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