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CENTER for BIOLOGICAL DIVERSITY Because life is good
ABOUT ACTION PROGRAMS SPECIES NEWSROOM PUBLICATIONS SUPPORT

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ENDANGERED SPECIES ACT PROFILE

PROTECTION STATUS: Not listed

PETITIONED: 2012

RANGE: Lost from 55 percent of its historic range in northwestern Arizona, southeastern Nevada and southwestern Utah; survives primarily in Utah

THREATS: Habitat loss and degradation due to water withdrawals, development, livestock grazing, pollution, drought, and climate change; competition and predation from nonnative fish

POPULATION TREND: The spinedace was once common but has declined drastically from historic levels of abundance. Remaining populations fluctuate based on the amount of water left in the river.

Photo by Ken Collins, USFWS