Crescent Gambusia
CR

Crescent Gambusia

Gambusia hurtadoi

Unknown

Photo: Photo: Wikimedia Commons, CC BY-SA

Overview

Gambusia hurtadoi is a small freshwater fish species endemic to Mexico, belonging to the family Poeciliidae. This livebearing fish is found in extremely limited freshwater habitats within the country's interior drainage systems. The species exhibits typical gambusia characteristics, including a small body size and the ability to reproduce through internal fertilization, with females giving birth to live young rather than laying eggs.

Gambusia hurtadoi faces severe threats to its survival, primarily from habitat destruction and degradation of its freshwater environments. Human activities including agricultural development, water extraction, and pollution have significantly impacted the limited water bodies where this species occurs. The introduction of non-native fish species has also posed additional pressure through competition and predation.

Climate change and prolonged drought conditions further threaten the already restricted aquatic habitats essential for the species' survival. The extremely limited distribution range makes Gambusia hurtadoi particularly vulnerable to local extinctions, as any disturbance to its habitat could potentially eliminate entire populations. Conservation efforts for this critically endangered species remain limited, though habitat protection and water quality management are essential for preventing extinction.

Research into the species' specific ecological requirements and population status is needed to develop effective conservation strategies. The preservation of remaining freshwater habitats and control of invasive species are critical components for the long-term survival of Gambusia hurtadoi.

Gambusia hurtadoi faces severe threats from habitat destruction caused by agricultural development, water extraction, and pollution of its limited freshwater environments. The introduction of non-native fish species has created additional pressure through competition and predation. Climate change and drought conditions further threaten the already restricted aquatic habitats essential for this species' survival.

Threat summary

Habitat

Gambusia hurtadoi inhabits freshwater environments within Mexico's interior drainage systems. The species is restricted to small freshwater bodies including springs, streams, and associated aquatic habitats with limited geographic distribution.

FRESHWATER· major

Conservation measures underway

Awareness & communications

Frequently asked questions

Why is Crescent Gambusia classified as Critically Endangered?
Crescent Gambusia 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. Gambusia hurtadoi faces severe threats from habitat destruction caused by agricultural development, water extraction, and pollution of its limited freshwater environments. The introduction of non-native fish species has created additional pressure through competition and predation. Climate change and drought conditions further threaten the already restricted aquatic habitats essential for this species' survival.
Where does Crescent Gambusia live?
Crescent Gambusia occurs in Mexico, and United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Crescent Gambusia?
The main threats to Crescent Gambusia are 11.1, 2.1, 5.3, and 7.2. The full IUCN-classified threat record for this species is detailed on the species page.

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