These fish exposed to Whirling Disease positive waters in Pelican Creek, a tributary of Yellowstone Lake, are showing classic signs of the disease. The light colored flashing is caused by uncontrolled movements (whirling) associated with neurological problems the disease can cause. Whirling behavior in the lab is often cause by external stimulus such as feeding, movement or lighting changes around the tanks. Upon very close inspection of the movies one can also see black tails on some of the fish. Black tail is another clinical sign often seen in highly infected fish.

More information about the associated research project may be found in our Research Projects Database.

Viewing Instructions: Choose either the larger or smaller version of each movie. Click on the "Watch Online" link to watch the movie online in a separate browser window, or right-click (control-click Mac) the "Download" link to download a movie and play it on your own computer.

You'll need a current version of QuickTime to view these movies. Go to the QuickTime web site to download the most current version.

Note: If you are unable to play the movies online, try downloading them. Your browser may not be set properly to view QuickTime movies.



Lower Pelican Creek - 10/03

Larger Movie [4.4 MB QuickTime Movie]
Better Quality for Faster, Broadband Connections

Watch Online Download

Smaller Movie [1.1 MB QuickTime Movie]
Lesser Quality for Slower, Dial-Up Connections

Watch Online Download
     
 

Middle Pelican Creek - 10/03

Larger Movie [3.9 MB QuickTime Movie]
Better Quality
for Faster, Broadband Connections

Watch Online Download

Smaller Movie [1.1 MB QuickTime Movie]
Lesser Quality for Slower, Dial-Up Connections

Watch Online Download
     
 

Mouth of Pelican Creek - 10/03

Larger Movie [5.3 MB QuickTime Movie]
Better Quality for Faster, Broadband Connections

Watch Online Download

Smaller Movie [1.2 MB QuickTime Movie]
Lesser Quality for Slower, Dial-Up Connections

Watch Online Download