Etruscan Chub
CR

Etruscan Chub

Squalius lucumonis

DecliningENEUENEU

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Squalius_lucumonis

Overview

Squalius lucumonis, the Etruscan chub, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, the daces, Eurasian minnows and related fishes. This species is endemic to Italy.

Squalius lucumonis faces severe population decline due to habitat degradation from agricultural runoff and urban development in its limited river systems. Water abstraction for irrigation has reduced flow rates and altered water chemistry, while introduced non-native fish species compete for resources and potentially hybridize with remaining populations. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes.

Threat summary

Habitat

This endemic cyprinid fish inhabits clear, fast-flowing streams and small rivers in central Italy, particularly in the Tiber River basin. It prefers well-oxygenated waters with rocky or gravel substrates and moderate to swift currents.

Wetlands (inland)· majorWetlands (inland) - Permanent rivers/streams· majorRocky areas· major

Conservation measures underway

Species reintroductionEx-situ conservationLegislation

Other threatened species in LEUCISCIDAE

VU

Tagus Chub

Squalius pyrenaicus

Declining
EN

Eastern Aegean bleak

Alburnus demiri

Declining
EN

Yliki Roach

Rutilus ylikiensis

Unknown
CR

Barada spring minnow

Pseudophoxinus syriacus

Declining

Threatened in Italy

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Arum apulum

Declining
EN

Pipizella nigriana

Unknown

Frequently asked questions

Why is Etruscan Chub classified as Critically Endangered?
Etruscan Chub is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Squalius lucumonis faces severe population decline due to habitat degradation from agricultural runoff and urban development in its limited river systems. Water abstraction for irrigation has reduced flow rates and altered water chemistry, while introduced non-native fish species compete for resources and potentially hybridize with remaining populations. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes.
Where does Etruscan Chub live?
Etruscan Chub occurs in Italy. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Etruscan Chub?
The main threats to Etruscan Chub are 1.1, 11.1, 11.2, and 2.1. The full IUCN-classified threat record for this species is detailed on the species page.

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