Larval Zebrafish Locomotor Activity Assay (VIDEO) Cell Press This video is under embargo. Please login to access this 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. License Licensed content 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.