CRCritically Endangered

Gobiesox juniperoserrai

Gobiesox juniperoserrai is a critically endangered species of clingfish endemic to the coastal waters of Baja California, Mexico. This small marine fish belongs to the family Gobiesocidae, characterized by their distinctive adhesive disc that allows them to cling to rocky surfaces in intertidal and shallow subtidal zones.

Decreasing

Population trend

1

Countries

01Classification

Taxonomy & Classification

Kingdom

ANIMALIA

Phylum

CHORDATA

Class

ACTINOPTERYGII

Order

GOBIESOCIFORMES

Family

GOBIESOCIDAE

Genus

Gobiesox

Gobiesox juniperoserrai belongs to the family GOBIESOCIDAE, order GOBIESOCIFORMES, within the ACTINOPTERYGII class.

02Description

Species Profile

Gobiesox juniperoserrai is a critically endangered species of clingfish endemic to the coastal waters of Baja California, Mexico. This small marine fish belongs to the family Gobiesocidae, characterized by their distinctive adhesive disc that allows them to cling to rocky surfaces in intertidal and shallow subtidal zones. The species was named in honor of Mexican marine biologist Junípero Serra and represents one of the most geographically restricted clingfish species known to science. G. juniperoserrai inhabits rocky intertidal pools and adjacent shallow waters along a very limited stretch of coastline, making it extremely vulnerable to environmental changes and human activities. The species faces significant threats from coastal development, pollution, and climate change impacts including ocean warming and acidification. Its restricted range means that even localized disturbances can have devastating effects on the entire population. The rocky shore habitats where this species lives are particularly susceptible to human interference through construction, tourism activities, and marine pollution. Conservation efforts for G. juniperoserrai are limited but include habitat protection measures and ongoing monitoring of remaining populations. Research continues to better understand the species' ecology, reproductive biology, and specific habitat requirements to inform more targeted conservation strategies. The critically endangered status reflects the urgent need for immediate conservation action to prevent extinction of this endemic Mexican marine species.

Gobiesox juniperoserrai faces severe threats from coastal development and human activities that directly impact its rocky intertidal habitat. Climate change effects including ocean warming and acidification pose additional risks to this geographically restricted species. The extremely limited range makes the entire population vulnerable to localized environmental disturbances and pollution events.

Key Facts

IUCN StatusCritically Endangered (CR)
TrendDecreasing
GroupFishes
03Habitat

Habitat & Distribution

This species inhabits rocky intertidal pools and shallow subtidal zones along the coast of Baja California, Mexico. The rocky shore environment provides the hard surfaces necessary for the species' characteristic clinging behavior and feeding activities.

Wetlands (inland) - Permanent rivers/streamsMajor
04Threats

Threats

!

IUCN Red List: Critically Endangered

Gobiesox juniperoserrai faces severe threats from coastal development and human activities that directly impact its rocky intertidal habitat. Climate change effects including ocean warming and acidification pose additional risks to this geographically restricted species. The extremely limited range makes the entire population vulnerable to localized environmental disturbances and pollution events.

Dams & water management/use

Ongoing

Invasive non-native/alien species/diseases

Ongoing
06Range

Found in 1 Country

Community

Community Sightings

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07Sources

Sources & Attribution

How to Cite

IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS

GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org

This page: SpeciesRadar (2025). Gobiesox juniperoserrai (Gobiesox juniperoserrai). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/peninsular-clingfish

Full citation guide & data usage terms