The Arizona Game and Fish Department has stopped trout deliveries from a hatchery near Cornville after finding invasive mud snails during a routine survey.
The department has been buying fish from out-of-state vendors to ensure trout are stocked as scheduled.
Officials say wildlife might have brought New Zealand mud snails from Oak Creek to the Page Springs Fish Hatchery.
The mud snails reproduce quickly and can disrupt the food chain.
Game and Fish continues to sample more areas and is conducting a treatment in an effort to eradicate the mud snails from the facility.
