Effect of 'Love Hormone' on Starfish (VIDEO) Queen Mary University of London This video is under embargo. Please login to access this video. Caption Injection of an oxytocin-type hormone (asterotocin) in a starfish triggers the stomach to be everted out of its mouth, whereas injection of water (H20) has no effect. Credit Maurice Elphick Usage Restrictions None 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.