In it, the health department only rules out three species channel catfish, gizzard shad, and white catfish.

WSJ: You Can't Get Seasick on a Park Bench

Meanwhile, aliens including fathead minnows, channel catfish and common carp, which would have been hard put to survive in the savage waters of the undammed canyon, have moved in.

ECONOMIST: Flooding the Grand Canyon

To his mind he was no more a thief of Nature than when, a country boy during the Depression, he had hooked 20-pound channel catfish, now long gone, out of the Chattahoochee River.

ECONOMIST: Ray Anderson