Why San Diego Fairy Shrimp Are Threatened

Endemic to Southern California's vernal pools, Branchinecta sandiegonensis faces a cocktail of threats:

• Habitat loss: Urban sprawl fills or fragments the seasonal pools they require.
• Water pollution: Runoff (pesticides, oil, sewage) degrades water chemistry.
• Predation: Invasive fish, bullfrogs, birds, and insects feast on them.
• Climate change: Altered rainfall patterns shrink pool duration; intense storms scour pools.

Listed threatened under the ESA (1997). Conservation focuses on pool preservation, restoration, and captive breeding.