Delturus parahybae
CR

Delturus parahybae

Declining

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

Overview

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

Delturus parahybae faces severe threats from dam construction and water diversions that fragment its riverine habitat and alter natural flow regimes essential for its survival. Agricultural runoff and urban pollution from expanding settlements along the Paraíba do Sul River basin have degraded water quality, while sedimentation from deforestation reduces suitable spawning and feeding areas. The species' restricted range within southeastern Brazil's heavily developed river systems makes it particularly vulnerable to these cumulative anthropogenic pressures.

Threat summary

Habitat

This freshwater fish species inhabits the Paraíba do Sul River basin in southeastern Brazil, preferring clear, well-oxygenated waters with rocky or sandy substrates. It typically occurs in medium to large rivers with moderate to fast currents, often associated with areas containing fallen logs and aquatic vegetation that provide shelter and feeding opportunities.

FRESHWATER· major

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Frequently asked questions

Why is Delturus parahybae classified as Critically Endangered?
Delturus parahybae 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. Delturus parahybae faces severe threats from dam construction and water diversions that fragment its riverine habitat and alter natural flow regimes essential for its survival. Agricultural runoff and urban pollution from expanding settlements along the Paraíba do Sul River basin have degraded water quality, while sedimentation from deforestation reduces suitable spawning and feeding areas. The species' restricted range within southeastern Brazil's heavily developed river systems makes it particularly vulnerable to these cumulative anthropogenic pressures.
Where does Delturus parahybae live?
Delturus parahybae occurs in Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Delturus parahybae?
The main threats to Delturus 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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