The image to the left is Winter Rainbow by Neil Welliver
 

Jeffrey A. Walker

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QT videos

(click on image to download file)
 

Rowing stroke of threespine stickleback (4.9 MB)
 
Flapping stroke of bird wrasse (4.8 MB)
  Rowing antennae in the "escape" response of a Daphnia sp. (2.5 MB file) at 500 Hz
  Rowing stroke of a dytiscid beetle. Notice how the limbs and setae (swimming hairs) collapse during the recovery stroke and expand during the power stroke
 
Sharp but slow turn in boxfish, dorsal view (7.5 MB)
 
Sharp but slow turn in boxfish, lateral view (10.8 MB)
 

Major axis of body shape variation among threespine sticklebacks

(highly correlated with amount of lake that can support aquatic vegetation)
 

Second axis of body shape variation among threespine sticklebacks

(highly correlated with presence/absence of predatory fish)