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AnimalsMarana, Arizona

183 endangered desert pupfish got a new pond in Marana

Marana and Arizona Game and Fish released 183 endangered desert pupfish into El Rio Preserve's 9-acre pond under a safe harbor agreement, hoping the pond becomes a source for new sites.

Verified · Source: Tucson Local MediaNov 11, 2026 · 1 min read
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A small pale fish swimming just above a sandy bottom
Illustrative photo of a desert pupfish. These are not the fish released at El Rio Preserve. jkirkhart35 / Wikimedia Commons · CC BY 2.0

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The reporting lives at Tucson Local Media. Our summary is checked against it, and we link it on every story.

Marana and Arizona Game and Fish released 183 endangered desert pupfish into the 9-acre pond at El Rio Preserve, Tucson Local Media reported. The release is covered by a safe harbor agreement. Biologists hope the pond will become a source population, a group that can later supply fish for new sites. That is a hope for what the pond might do. The step that has happened is the release of these 183 fish.

For the classroom

Marana, Arizona, and the state's Game and Fish Department put 183 endangered desert pupfish into a pond at El Rio Preserve, Tucson Local Media reported. The pond covers about 9 acres. The release is under a safe harbor agreement, a kind of permission that lets the fish live on that site. Biologists hope the pond will someday supply fish for new places. That hope is a plan, not a second release that has already happened. The 183 are the fish that went into this pond.

  1. Why move endangered fish into a pond instead of only protecting the water they already use?
  2. What is the difference between fish released today and a pond that might supply fish later?
  3. Why does a small fish need a whole agreement before it can live in a new place?

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