(VIDEO) Institute for Bioengineering of Catalonia (IBEC) This video is under embargo. Please login to access this video. Caption Representative video clip of photocontrolled locomotion of zebrafis. Vehicle (black trace) treated animals show lower swimming activity and nearly absent photoresponses compared to intact ones. Behavioral photoresponses elicited by Carbadiazocine are observed and statistically significant, with 420 nm light increasing locomotion and 500 nm light decreasing it. Credit Institute for Bioengineering of Catalnoia (IBEC) Usage Restrictions Give credit License Original 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.