Jim White, Colorado Parks and Wildlife aquatic biologist, releases a few of the 450 Gunnison River rainbow trout that were stocked in the Animas River on Tuesday throughout Durango. The whirling disease-resistant fish came from the Glenwood Springs State Fish Hatchery and were all about 13 inches in length. Past fish surveys of the Animas show that the Gunnison trout do well in the river. (Jerry McBride/Durango Herald)

About 450 Gunnison River rainbow trout were stocked in the Animas River on Tuesday throughout Durango. The whirling disease-resistant fish came from the Glenwood Springs State Fish Hatchery and were all about 13 inches in length. Past fish surveys of the Animas show that the Gunnison trout do well in the river. (Jerry McBride/Durango Herald)

Austin Wenke with Colorado Parks and Wildlife releases a few of the 450 Gunnison River rainbow trout that were stocked in the Animas River on Tuesday throughout Durango. The whirling disease-resistant fish came from the Glenwood Springs State Fish Hatchery and were all about 13 inches in length. Past fish surveys of the Animas show that the Gunnison trout do well in the river. (Jerry McBride/Durango Herald)