Back to today’s briefing

Story perspectives

Endangered Sonoyta Pupfish Released to Boost Local Population

10/21/2025

44 9

Summary

Story summary

The endangered Sonoyta pupfish will be released into a stream at Biosphere 2 in Oracle, Arizona, to form a local population.
The species currently survives only in Quitobaquito Springs near the U.S.-Mexico border.
The release follows a Safe Harbor agreement between the U.S. Fish and Wildlife Service and the Arizona Game and Fish Department, transporting 150 to 300 fish.
The University of Arizona expects the pupfish to thrive in this habitat.

1 of 1

Story summary

The endangered Sonoyta pupfish will be released into a stream at Biosphere 2 in Oracle, Arizona, to form a local population.
The species currently survives only in Quitobaquito Springs near the U.S.-Mexico border.
The release follows a Safe Harbor agreement between the U.S. Fish and Wildlife Service and the Arizona Game and Fish Department, transporting 150 to 300 fish.
The University of Arizona expects the pupfish to thrive in this habitat.