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Niquim toadfish (Thalassophryne nattereri) — Batrachoididae

Niquim toadfish

Thalassophryne nattereri

The Niquim toadfish (Thalassophryne nattereri) is a brackish-water fish of the family Batrachoididae that grows up to 21 cm.

Length
21.3 cm
Water
Brackish
Depth
0–60.0 m
Behaviour
Solitary
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Venomous / poisonous
Range
South America: Brazil, French Guiana, Guyana, Suriname, Trinidad Tobago

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Description

Natterer's niquim toadfish is a truly venomous toadfish (Batrachoididae) from shallow coastal and estuarine water of the western Atlantic off Brazil. The species grows to about 15 cm and has a stocky, scaleless, brown body with a large, flat head and a wide mouth. As a bottom-dweller it often lies half-buried in sand and mud. Unlike most toadfishes it carries hollow dorsal and gill-cover spines linked to venom glands; a sting gives a very painful, strongly swelling wound. Treat as a serious venomous sting.

Frequently asked questions

How do you recognise the Niquim toadfish?

The Niquim toadfish has an elongate, eel-like body and is mainly brown. Bears venomous spines or tissue; handle with great care.

Where does the Niquim toadfish live?

The Niquim toadfish lives in brackish water and is mostly found around sand or mud bottom. South America: Brazil, French Guiana, Guyana, Suriname, Trinidad Tobago

How big does the Niquim toadfish get?

The Niquim toadfish grows to a maximum of about 21 cm.

Is the Niquim toadfish dangerous to humans?

The Niquim toadfish is venomous — handle spines with care and seek medical help after a sting if needed. For a sting from a fin spine: rinse the wound, remove any visible spine fragments and immerse the part for 30-90 minutes in water as hot as can be tolerated (about 45 C) to break down the venom. The pain can be severe. For marked swelling, a retained spine or signs of infection seek medical care and check tetanus status.

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All data

Identification

English name
Niquim toadfish sourced
Scientific name
Thalassophryne nattereri
Family
Batrachoididae
Other names
Copper Joe sourced

Appearance

Size class
Medium verified
Max length (cm)
21.3 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Tail shape
Rounded inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Brackish sourced
Substrate
Sand / mud bottom sourced
Max depth (m)
60.0 verified
Natural range
South America: Brazil, French Guiana, Guyana, Suriname, Trinidad Tobago sourced
Origin
Native inferred

Behaviour & biology

Social behaviour
Solitary inferred
Territorial
No inferred
Activity
Nocturnal inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Bears venomous spines or tissue; handle with great 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
Venomous / poisonous verified
First aid
For a sting from a fin spine: rinse the wound, remove any visible spine fragments and immerse the part for 30-90 minutes in water as hot as can be tolerated (about 45 C) to break down the venom. The pain can be severe. For marked swelling, a retained spine or signs of infection seek medical care and check tetanus status. sourced

Status & sources

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

Same genus Thalassophryne

More from the family Batrachoididae

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