VU

Shortjaw mudsucker

Gillichthys seta

Unknown

Overview

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

The Shortjaw mudsucker faces severe habitat degradation from urban development and industrial activities along Southern California's coastal wetlands. Water diversions and altered freshwater flows have disrupted the salinity gradients essential for this species' survival in estuarine environments. Pollution from agricultural runoff and urban stormwater has further compromised water quality in the shallow mudflats and salt marshes where this endemic fish breeds and feeds.

Threat summary

Habitat

The Shortjaw mudsucker inhabits shallow estuarine waters, salt marshes, and mudflats along the Southern California coast, particularly in areas where freshwater streams meet tidal zones. This species requires specific salinity gradients and soft sediment substrates for foraging on small invertebrates and organic matter.

MARINE· major

Frequently asked questions

Why is Shortjaw mudsucker classified as Vulnerable?
Shortjaw mudsucker is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Shortjaw mudsucker faces severe habitat degradation from urban development and industrial activities along Southern California's coastal wetlands. Water diversions and altered freshwater flows have disrupted the salinity gradients essential for this species' survival in estuarine environments. Pollution from agricultural runoff and urban stormwater has further compromised water quality in the shallow mudflats and salt marshes where this endemic fish breeds and feeds.
Where does Shortjaw mudsucker live?
Shortjaw mudsucker occurs in Mexico, Sweden, and Thailand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Shortjaw mudsucker?
The main threats to Shortjaw mudsucker 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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