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Least madtom (Noturus hildebrandi) — Ictaluridae

Least madtom

Noturus hildebrandi
Family: Ictaluridae

The Least madtom (Noturus hildebrandi) is a freshwater fish of the family Ictaluridae that grows up to 7 cm.

Length
6.9 cm
Water
Freshwater
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Stone or rock
Danger
Venomous / poisonous
Range
North America: USA

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Description

The Least madtom is a madtom (Ictaluridae) from fresh water of the Mississippi system in the southeastern United States. The species grows to about 8 cm and has a stocky, brownish body with barbels, a flattened head and an adipose fin fold fused to the tail. As a nocturnal bottom-dweller it shelters by day under stones, wood and leaf litter of clear streams and snaps at insect larvae and small invertebrates. The pectoral spines are venomous and can give a painful puncture wound.

Frequently asked questions

How do you recognise the Least madtom?

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

Where does the Least madtom live?

The Least madtom lives in fresh water and is mostly found around stony or rocky ground. North America: USA

How big does the Least madtom get?

The Least madtom grows to a maximum of about 7 cm. On average the species is around 4 cm.

Is the Least madtom dangerous to humans?

The Least madtom 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.

More photos

Least madtom (Noturus hildebrandi) — Ictaluridae — 2
iNaturalist ((c) lefua, some rights reserved (CC BY-NC))
Least madtom (Noturus hildebrandi) — Ictaluridae — 3
iNaturalist ((c) Jared Gorrell, some rights reserved (CC BY-NC))
Least madtom (Noturus hildebrandi) — Ictaluridae — 4
iNaturalist ((c) jasonrl, some rights reserved (CC BY-NC))
Least madtom (Noturus hildebrandi) — Ictaluridae — 5
iNaturalist ((c) Zakqary Roy, some rights reserved (CC BY))
Fin

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All data

Identification

English name
Least madtom sourced
Scientific name
Noturus hildebrandi
Family
Ictaluridae

Appearance

Size class
Small verified
Max length (cm)
6.9 verified
Average length (cm)
3.7 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Tail shape
Rounded inferred
Barbels
Yes sourced
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Stone or rock sourced
Natural range
North America: USA sourced
Origin
Native inferred

Behaviour & biology

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 venomous spines or tissue; handle with great care. inferred

For anglers

Fishing method
Small in size and barely an angling target; mostly caught incidentally or as baitfish. 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 Noturus

More from the family Ictaluridae

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