EN

Steindachneridion parahybae

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Steindachneridion parahybae faces severe population decline primarily due to dam construction and river regulation throughout the Paraíba do Sul River basin, which fragments populations and disrupts spawning migrations. Water pollution from industrial discharge and agricultural runoff has degraded water quality in key habitats, while overfishing has reduced breeding populations. The species' specialized habitat requirements and limited distribution make it particularly vulnerable to these cumulative pressures.

Threat summary

Habitat

This large catfish inhabits the freshwater rivers and tributaries of the Paraíba do Sul River basin in southeastern Brazil, preferring deep pools and rocky substrates in medium to large rivers. The species requires clean, well-oxygenated waters and undertakes spawning migrations between different river sections.

FRESHWATER· major

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Frequently asked questions

Why is Steindachneridion parahybae classified as Endangered?
Steindachneridion parahybae is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Steindachneridion parahybae faces severe population decline primarily due to dam construction and river regulation throughout the Paraíba do Sul River basin, which fragments populations and disrupts spawning migrations. Water pollution from industrial discharge and agricultural runoff has degraded water quality in key habitats, while overfishing has reduced breeding populations. The species' specialized habitat requirements and limited distribution make it particularly vulnerable to these cumulative pressures.
Where does Steindachneridion parahybae live?
Steindachneridion parahybae occurs in Argentina, and Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Steindachneridion parahybae?
The main threats to Steindachneridion parahybae are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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