Zebrafish Swimming (video) Northwestern University Loading video... Caption This is a video of a larval zebrafish swimming, viewed from above. These 4-mm-long fish can move their tail back and forth up to 80 times per second, so high-speed cameras are necessary to visualize their swimming movements. This video has been slowed down to see the swimming behavior. Credit McLean lab, Northwestern University Usage Restrictions The inclusion of an institutional credit is required. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.