EN

Hasemania crenuchoides

Unknown

Overview

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

Hasemania crenuchoides faces severe population decline primarily due to habitat degradation from agricultural expansion and urban development within its restricted range in southeastern Brazil. Water pollution from agricultural runoff and domestic sewage significantly impacts the clear, fast-flowing streams this species requires for survival. The species' limited distribution makes it particularly vulnerable to localized environmental changes and habitat fragmentation.

Threat summary

Habitat

This small characin inhabits clear, fast-flowing streams and small rivers in the Atlantic Forest region of southeastern Brazil. The species prefers well-oxygenated waters with rocky or sandy substrates and abundant riparian vegetation.

FRESHWATER· major

Other threatened species in CHARACIDAE

VU

Astyanax tehuacanensis

Unknown
EN

Diapoma pyrrhopteryx

Unknown
VU

Hollandichthys taramandahy

Unknown
VU

Tetra

Hyphessobrycon arianae

Unknown

Threatened in Brazil

Striped SmoothhoundCR

Striped Smoothhound

Mustelus fasciatus

Declining
VU

Mussismilia hispida

Declining
VU

Myrcia carioca

Declining
Brasilia TapaculoEN

Brasilia Tapaculo

Scytalopus novacapitalis

Declining

Frequently asked questions

Why is Hasemania crenuchoides classified as Endangered?
Hasemania crenuchoides 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. Hasemania crenuchoides faces severe population decline primarily due to habitat degradation from agricultural expansion and urban development within its restricted range in southeastern Brazil. Water pollution from agricultural runoff and domestic sewage significantly impacts the clear, fast-flowing streams this species requires for survival. The species' limited distribution makes it particularly vulnerable to localized environmental changes and habitat fragmentation.
Where does Hasemania crenuchoides live?
Hasemania crenuchoides 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 Hasemania crenuchoides?
The main threats to Hasemania crenuchoides 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.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.