EN

Odontesthes bicudo

Declining

Overview

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

Odontesthes bicudo faces severe population decline primarily due to habitat degradation in its restricted freshwater range. Dam construction and water diversion projects have altered natural flow regimes and fragmented populations. Water pollution from agricultural runoff and urban development further compromises water quality in the limited river systems where this endemic silverside persists.

Threat summary

Habitat

This endemic silverside inhabits freshwater river systems and associated tributaries in southeastern Brazil. The species requires clean, flowing waters with specific temperature and oxygen conditions typical of its restricted geographic range.

Other threatened species in ATHERINOPSIDAE

VU

Limb Kingfish

Membras dissimilis

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Odontesthes mauleanum

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Atherinella sardina

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EN

Atherinella venezuelae

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Frequently asked questions

Why is Odontesthes bicudo classified as Endangered?
Odontesthes bicudo 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. Odontesthes bicudo faces severe population decline primarily due to habitat degradation in its restricted freshwater range. Dam construction and water diversion projects have altered natural flow regimes and fragmented populations. Water pollution from agricultural runoff and urban development further compromises water quality in the limited river systems where this endemic silverside persists.
Where does Odontesthes bicudo live?
Odontesthes bicudo occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Odontesthes bicudo?
The main threats to Odontesthes bicudo 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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