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The minnowlike Gila Chub, found in Arizona and New Mexico, is threatened by loss of habitat and has been listed as an endangered species since 2005.

The U.S. Fish and Wildlife Service proposed a recovery plan Tuesday for the endangered Gila chub that seeks to reduce threats from nonnative species and protect the fish’s degraded habitat in Arizona and New Mexico. Read more»

A graphic explaining endangered fish in Arizona.

The author of a bill that would require officials to conduct impact studies and notify residents before using aquatic poisons to control non-native fish says the human health risks associated with these chemicals call for regulations. Read more»

The U.S. Fish and Wildlife Service wants to list the Zuni bluehead sucker as an endangered species, saying it can now only be found in 10 percent of its historic range in Arizona and New Mexico.

The U.S. Fish and Wildlife Service on Friday proposed listing a small freshwater fish as an endangered species and setting aside almost 300 miles of Arizona and New Mexico streams as critical habitat for the Zuni bluehead sucker. Read more»

Tons of imported fish laced with chemicals banned from the U.S. food supply, including carcinogens, are routinely showing up in this country and, state officials say, winding up on American dinner plates. Read more»

McDonald's uses hoki and Alaska pollock in its famous Filet-o-Fish sandwich.

Navigating the waters of sustainable seafood seems daunting at first glance: Exactly which species lurks beneath the breading and between those sesame-seeded buns? How was it caught? Where did it come from? There's an app for that. Read more»

The tiny spikedace is native to central and eastern Arizona and western New Mexico. The U.S. Fish and Wildlife Service has proposed listing the spikedace and loach minnow as endangered and designated nearly 800 miles of streams and rivers as critical habitat to protect it.

Federal authorities plan to designate nearly 800 miles of critical habitat for two threatened fish species in the Southwest, and change the status of the fish – the spikedace and loach minnow – from "threatened" to "endangered." Read more»

Project manager Chuck Paradzick and Forest Service biologist Andre Silva examine netting placed just upstream of the dam’s construction.

Non-native aquatic species such as crayfish, mosquitofish and bullfrogs may threaten the ecological balance in the Tonto National Forest, leading the Salt River Project to construct a barrier on Lime Creek to prevent them from traveling farther upstream. Read more»