CR

Phalloptychus eigenmanni

Declining

Overview

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

Phalloptychus eigenmanni faces severe threats from urban development and agricultural expansion throughout its restricted range in southeastern Brazil. Water pollution from industrial discharge and agricultural runoff has degraded the quality of freshwater streams this species depends on for survival. The construction of dams and water diversions has fragmented populations and altered natural flow regimes critical for reproduction.

Threat summary

Habitat

This small freshwater fish inhabits shallow streams and tributaries in the Atlantic Forest region of southeastern Brazil. It prefers clear, slow-moving waters with sandy or muddy substrates and abundant aquatic vegetation.

FRESHWATER· major

Conservation measures underway

Ex-situ conservation

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Frequently asked questions

Why is Phalloptychus eigenmanni classified as Critically Endangered?
Phalloptychus eigenmanni 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. Phalloptychus eigenmanni faces severe threats from urban development and agricultural expansion throughout its restricted range in southeastern Brazil. Water pollution from industrial discharge and agricultural runoff has degraded the quality of freshwater streams this species depends on for survival. The construction of dams and water diversions has fragmented populations and altered natural flow regimes critical for reproduction.
Where does Phalloptychus eigenmanni live?
Phalloptychus eigenmanni 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 Phalloptychus eigenmanni?
The main threats to Phalloptychus eigenmanni 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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