Fish

A minnow that can reach six feet long and weigh eighty pounds—now that’s a fish story! But, this one happens to be true. The Colorado pikeminnow was known to reach such sizes.

The National Park Service began electrofishing in the Colorado River this week to kill smallmouth bass between Glen Canyon Dam and Lees Ferry. KNAU’s Melissa Sevigny reports, it follows an unsuccessful attempt to control the exotic fish by poisoning a nearby slough.

The Grand Canyon is a haven for native fish. But that’s now threatened by smallmouth bass, an exotic fish that eats native species and has recently escaped through Glen Canyon Dam. Scientists say a shock of cold water released through the dam might help keep their numbers down. KNAU’s Melissa Sevigny spoke with fish biologist Drew Eppehimer about the tradeoffs involved.

Biologists have worked for decades to restore native Apache trout to their home waters in the White Mountains. Now, wildlife biologists say those efforts may finally be paying off.

Humpback chub in the Grand Canyon have flourished under long-running restoration efforts. But now, exotic fish that prey on chub and other native fish have begun to slip through Glen Canyon Dam. It’s an unprecedented problem caused by the drought-stricken low levels of Lake Powell. KNAU’s Melissa Sevigny spoke with National Park Service fisheries biologist Melissa Trammell about her concerns.

The U.S. Fish and Wildlife Service ruled that a Colorado River fish called the roundtail chub will not receive protection under the Endangered Species Act. KNAU’s Melissa Sevigny reports, its status as a species has been debated for years.

The US Fish and Wildlife Service has downlisted a Colorado River fish from endangered to threatened. KNAU’s Melissa Sevigny reports, the agency says the…

The U.S. Fish and Wildlife Service proposed today to downgrade a Colorado River fish, the razorback sucker, from “endangered” to “threatened.” KNAU’s…

Here’s a fish story for you: what if you could get paid to go fishing all day? The National Park Service wants anglers to help get rid of exotic brown…

Endangered fish in the Colorado River face multiple threats. Their survival is linked to the river’s temperature, which is altered both by climate change…