CR

Atlantirivulus lazzarotoi

Unknown

Overview

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

Atlantirivulus lazzarotoi faces severe threats from urban expansion and agricultural development in its extremely limited range in southeastern Brazil. The species' restricted distribution to small freshwater streams makes it particularly vulnerable to water pollution from agricultural runoff and domestic waste. Habitat fragmentation from infrastructure development has isolated remaining populations, reducing genetic diversity and limiting recolonization potential.

Threat summary

Habitat

This critically endangered killifish inhabits small freshwater streams and shallow pools in the Atlantic Forest region of southeastern Brazil. The species requires clean, slow-moving waters with dense aquatic vegetation and is adapted to seasonal water level fluctuations typical of temporary pools.

FRESHWATER· major

Other threatened species in RIVULIDAE

EN

Flame Rivulus

Cynodonichthys uroflammeus

Unknown
CR

Campellolebias brucei

Unknown
CR

Hypsolebias gilbertobrasili

Unknown
CR

Kryptolebias campelloi

Unknown

Frequently asked questions

Why is Atlantirivulus lazzarotoi classified as Critically Endangered?
Atlantirivulus lazzarotoi 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. Atlantirivulus lazzarotoi faces severe threats from urban expansion and agricultural development in its extremely limited range in southeastern Brazil. The species' restricted distribution to small freshwater streams makes it particularly vulnerable to water pollution from agricultural runoff and domestic waste. Habitat fragmentation from infrastructure development has isolated remaining populations, reducing genetic diversity and limiting recolonization potential.
Where does Atlantirivulus lazzarotoi live?
Atlantirivulus lazzarotoi 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 Atlantirivulus lazzarotoi?
The main threats to Atlantirivulus lazzarotoi 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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