Larval Zebrafish Locomotor Activity Assay (video) Cell Press Share Print E-Mail Loading video... Caption This video shows a larval zebrafish locomotor activity assay used to monitor sleep/wake behaviors. Individual 5 day old wild-type zebrafish, which are about 4 mm long, are placed into each well of a 96-well plate, and a computer tracks their locomotor activity for several days. Credit Cindy N. Chiu and David A. Prober Usage Restrictions Credit Required. Share Print E-Mail 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.